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/*
 *  Copyright © 2002-2004 Marco Pesenti Gritti
 *  Copyright © 2003, 2004 Christian Persch
 *
 *  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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 *  $Id$
 */

#include "config.h"

#include "ephy-toolbars-model.h"
#include "ephy-file-helpers.h"
#include "ephy-prefs.h"
#include "eel-gconf-extensions.h"
#include "eggtypebuiltins.h"
#include "ephy-debug.h"

#include <string.h>

#define EPHY_TOOLBARS_XML_FILE      "epiphany-toolbars-3.xml"
#define EPHY_TOOLBARS_XML_VERSION   "1.1"

#define EPHY_TOOLBARS_MODEL_GET_PRIVATE(object)(G_TYPE_INSTANCE_GET_PRIVATE ((object), EPHY_TYPE_TOOLBARS_MODEL, EphyToolbarsModelPrivate))

struct _EphyToolbarsModelPrivate
{
    char *xml_file;
    EggTbModelFlags style;
    guint timeout;
    guint style_notifier_id;
};

static void ephy_toolbars_model_class_init (EphyToolbarsModelClass *klass);
static void ephy_toolbars_model_init       (EphyToolbarsModel *model);

G_DEFINE_TYPE (EphyToolbarsModel, ephy_toolbars_model, EGG_TYPE_TOOLBARS_MODEL)

static gboolean
save_changes_idle (EphyToolbarsModel *model)
{
    LOG ("Saving toolbars model");

    egg_toolbars_model_save_toolbars
        (EGG_TOOLBARS_MODEL (model),
         model->priv->xml_file,
         EPHY_TOOLBARS_XML_VERSION);

    model->priv->timeout = 0;

    /* don't run again */
    return FALSE;
}

static void
save_changes (EphyToolbarsModel *model)
{
    if (model->priv->timeout == 0)
    {
        model->priv->timeout =
            g_idle_add ((GSourceFunc) save_changes_idle, model);
    }
}

static void
update_flags (EphyToolbarsModel *model)
{
    EggToolbarsModel *eggmodel = EGG_TOOLBARS_MODEL (model);
    int i, n_toolbars;
    int flag = 0;

    n_toolbars = egg_toolbars_model_n_toolbars (eggmodel);

    if (n_toolbars <= 1)
    {
        flag |= EGG_TB_MODEL_NOT_REMOVABLE;
    }

    for (i = 0; i < n_toolbars; i++)
    {
        const char *t_name;
        EggTbModelFlags flags;

        t_name = egg_toolbars_model_toolbar_nth (eggmodel, i);
        g_return_if_fail (t_name != NULL);

        flags = egg_toolbars_model_get_flags (eggmodel, i);
        flags &= ~(EGG_TB_MODEL_NOT_REMOVABLE | EGG_TB_MODEL_STYLES_MASK);
        flags |= flag;
        flags |= model->priv->style;
        egg_toolbars_model_set_flags (eggmodel, i, flags);
    }
}

static void
update_flags_and_save_changes (EphyToolbarsModel *model)
{
    update_flags (model);
    save_changes (model);
}

static EggTbModelFlags
get_toolbar_style (void)
{
    GFlagsClass *flags_class;
    const GFlagsValue *value;
    EggTbModelFlags flags = 0;
    char *pref;

    pref = eel_gconf_get_string (CONF_INTERFACE_TOOLBAR_STYLE);
    if (pref != NULL)
    {
        flags_class = g_type_class_ref (EGG_TYPE_TB_MODEL_FLAGS);
        value = g_flags_get_value_by_nick (flags_class, pref);
        if (value != NULL)
        {
            flags = value->value;
        }
        g_type_class_unref (flags_class);
    }
    flags &= EGG_TB_MODEL_STYLES_MASK;

    g_free (pref);

    return flags;
}

static void
toolbar_style_notifier (GConfClient *client,
            guint cnxn_id,
            GConfEntry *entry,
            EphyToolbarsModel *model)
{
    model->priv->style = get_toolbar_style ();

    update_flags (model);
}

void
ephy_toolbars_model_load (EphyToolbarsModel *model)
{
    EggToolbarsModel *eggmodel = EGG_TOOLBARS_MODEL (model);
    gboolean success;
    int i;

    egg_toolbars_model_load_names (eggmodel, ephy_file ("epiphany-toolbar.xml"));
  
    success = egg_toolbars_model_load_toolbars (eggmodel, model->priv->xml_file);
    LOG ("Loading the toolbars was %ssuccessful", success ? "" : "un");

    /* maybe an old format, try to migrate: load the old layout, and
     * remove the BookmarksBar toolbar
     */
    if (success == FALSE)
    {
        char *old_xml;

        old_xml = g_build_filename (ephy_dot_dir (),
                        "epiphany-toolbars-2.xml",
                        NULL);
        success = egg_toolbars_model_load_toolbars (eggmodel, old_xml);
        g_free (old_xml);

        if (success == TRUE)
        {
            old_xml = g_build_filename (ephy_dot_dir (),
                            "epiphany-bookmarksbar.xml",
                            NULL);
            egg_toolbars_model_load_toolbars (eggmodel, old_xml);
            g_free (old_xml);
        }

        LOG ("Migration was %ssuccessful", success ? "" : "un");
    }
    
    if (success == FALSE)
    {
        char *old_xml;

        old_xml = g_build_filename (ephy_dot_dir (),
                        "epiphany-toolbars.xml",
                        NULL);
        success = egg_toolbars_model_load_toolbars (eggmodel, old_xml);
        g_free (old_xml);

        LOG ("Migration was %ssuccessful", success ? "" : "un");
    }

    /* Still no success, load the default toolbars */
    if (success == FALSE)
    {
        success = egg_toolbars_model_load_toolbars
                (eggmodel, ephy_file ("epiphany-toolbar.xml"));
        LOG ("Loading the default toolbars was %ssuccessful", success ? "" : "un");
    }

    /* Cleanup any empty toolbars */
    for (i = egg_toolbars_model_n_toolbars (eggmodel)-1; i >= 0; i--)
    {
        if (egg_toolbars_model_n_items (eggmodel, i) == 0)
        {
            egg_toolbars_model_remove_toolbar (eggmodel, i);
        }
    }
    
    /* Ensure we have at least 1 toolbar */
    if (egg_toolbars_model_n_toolbars (eggmodel) < 1)
    {
        egg_toolbars_model_add_toolbar (eggmodel, 0, "DefaultToolbar");
    }
}

static void
ephy_toolbars_model_init (EphyToolbarsModel *model)
{
    EphyToolbarsModelPrivate *priv;

    priv = model->priv = EPHY_TOOLBARS_MODEL_GET_PRIVATE (model);

    priv->xml_file = g_build_filename (ephy_dot_dir (),
                       EPHY_TOOLBARS_XML_FILE,
                       NULL);

    priv->style = get_toolbar_style ();
    priv->style_notifier_id = eel_gconf_notification_add
        (CONF_INTERFACE_TOOLBAR_STYLE,
         (GConfClientNotifyFunc) toolbar_style_notifier, model);
    
    g_signal_connect_after (model, "item_added",
                G_CALLBACK (save_changes), NULL);
    g_signal_connect_after (model, "item_removed",
                G_CALLBACK (save_changes), NULL);
    g_signal_connect_after (model, "toolbar_added",
                G_CALLBACK (update_flags_and_save_changes), NULL);
    g_signal_connect_after (model, "toolbar_removed",
                G_CALLBACK (update_flags_and_save_changes), NULL);
}

static void
ephy_toolbars_model_dispose (GObject *object)
{
    EphyToolbarsModel *model = EPHY_TOOLBARS_MODEL (object);

    save_changes_idle (model);

    G_OBJECT_CLASS (ephy_toolbars_model_parent_class)->dispose (object);
}

static void
ephy_toolbars_model_finalize (GObject *object)
{
    EphyToolbarsModel *model = EPHY_TOOLBARS_MODEL (object);
    EphyToolbarsModelPrivate *priv = model->priv;

    if (priv->style_notifier_id != 0)
    {
        eel_gconf_notification_remove (priv->style_notifier_id);
    }

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

    g_free (priv->xml_file);

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

static void
ephy_toolbars_model_class_init (EphyToolbarsModelClass *klass)
{
    GObjectClass *object_class = G_OBJECT_CLASS (klass);

    object_class->dispose = ephy_toolbars_model_dispose;
    object_class->finalize = ephy_toolbars_model_finalize;

    g_type_class_add_private (object_class, sizeof (EphyToolbarsModelPrivate));
}

EggToolbarsModel *
ephy_toolbars_model_new (void)
{
    return EGG_TOOLBARS_MODEL (g_object_new (EPHY_TYPE_TOOLBARS_MODEL, NULL));
}