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/*
 *  Copyright (C) 2002 Marco Pesenti Gritti
 *
 *  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.
 *
 *  $Id$
 */

#include "ephy-toolbars-model.h"
#include "ephy-dnd.h"
#include "ephy-bookmarks.h"
#include "ephy-node-common.h"
#include "ephy-file-helpers.h"
#include "ephy-shell.h"
#include "ephy-debug.h"
#include "ephy-string.h"

#include <string.h>
#include <bonobo/bonobo-i18n.h>

static void ephy_toolbars_model_class_init (EphyToolbarsModelClass *klass);
static void ephy_toolbars_model_init       (EphyToolbarsModel *t);
static void ephy_toolbars_model_finalize   (GObject *object);

#define EPHY_TOOLBARS_XML_VERSION "1.0"

enum
{
    ACTION_ADDED,
    LAST_SIGNAL
};

enum
{
    PROP_0,
    PROP_BOOKMARKS
};

enum
{
    URL,
    NAME
};

static GObjectClass *parent_class = NULL;

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

struct EphyToolbarsModelPrivate
{
    EphyBookmarks *bookmarks;
    char *xml_file;
    gboolean loading;
};

GType
ephy_toolbars_model_get_type (void)
{
    static GType ephy_toolbars_model_type = 0;

    if (ephy_toolbars_model_type == 0)
    {
        static const GTypeInfo our_info = {
        sizeof (EphyToolbarsModelClass),
        NULL,           /* base_init */
        NULL,           /* base_finalize */
        (GClassInitFunc) ephy_toolbars_model_class_init,
        NULL,
        NULL,           /* class_data */
        sizeof (EphyToolbarsModel),
        0,          /* n_preallocs */
        (GInstanceInitFunc) ephy_toolbars_model_init
    };

    ephy_toolbars_model_type = g_type_register_static (EGG_TOOLBARS_MODEL_TYPE,
                               "EphyToolbarsModel",
                               &our_info, 0);
    }

    return ephy_toolbars_model_type;
}

char *
ephy_toolbars_model_get_action_name (EphyToolbarsModel *model,
                     long id)
{
    return g_strdup_printf ("GoBookmark-%ld", id);
}

EphyNode *
ephy_toolbars_model_get_node (EphyToolbarsModel *model,
                  const char *action_name)
{
    EphyBookmarks *bookmarks = EPHY_TOOLBARS_MODEL (model)->priv->bookmarks;
    long node_id;

    if (!ephy_string_to_int (action_name + strlen ("GoBookmark-"), &node_id))
    {
        return NULL;
    }

    return ephy_bookmarks_get_from_id (bookmarks, node_id);
}

static void
bookmark_destroy_cb (EphyNode *node,
             EphyToolbarsModel *model)
{
    long id;

    id = ephy_node_get_id (node);
    ephy_toolbars_model_remove_bookmark (model, id);
}

static char *
impl_get_item_name (EggToolbarsModel *t,
            const char       *type,
            const char       *id)
{
    EphyToolbarsModel *model = EPHY_TOOLBARS_MODEL (t);
    EphyNode *node;

    if (strcmp (type, EPHY_DND_TOPIC_TYPE) == 0)
    {
        char *uri;

        node = ephy_toolbars_model_get_node (model, id);
        g_return_val_if_fail (node != NULL, NULL);

        uri = ephy_bookmarks_get_topic_uri
            (model->priv->bookmarks, node);

        return uri;
    }
    else if (strcmp (type, EPHY_DND_URL_TYPE) == 0)
    {
        const char *name;

        node = ephy_toolbars_model_get_node (model, id);
        g_return_val_if_fail (node != NULL, NULL);

        name = ephy_node_get_property_string
                        (node, EPHY_NODE_BMK_PROP_LOCATION);

        return g_strdup (name);
    }

    return EGG_TOOLBARS_MODEL_CLASS (parent_class)->get_item_name (t, type, id);
}

static char *
impl_get_item_id (EggToolbarsModel *t,
          const char       *type,
          const char       *name)
{
    EphyToolbarsModel *model = EPHY_TOOLBARS_MODEL (t);
    EphyBookmarks *bookmarks = model->priv->bookmarks;

    if (strcmp (type, EPHY_DND_TOPIC_TYPE) == 0)
    {
        EphyNode *topic;

        topic = ephy_bookmarks_find_keyword (bookmarks, name, FALSE);
        if (topic == NULL) return NULL;

        return ephy_toolbars_model_get_action_name
            (model, ephy_node_get_id (topic));
    }
    else if (strcmp (type, EPHY_DND_URL_TYPE) == 0)
    {
        EphyNode *node = NULL;
        gchar **netscape_url;

        netscape_url = g_strsplit (name, "\n", 2);
        node = ephy_bookmarks_find_bookmark (bookmarks, netscape_url[URL]);

        if (!node)
        {
            /* Create the bookmark, it does not exist */
            EphyHistory *gh;
            const char *icon;
            const char *title;

            title = netscape_url[NAME];
            if (title == NULL || *title == '\0')
            {
                title = _("Untitled");
            }

            node = ephy_bookmarks_add (bookmarks, title, netscape_url[URL]);
            g_return_val_if_fail (node != NULL, NULL);

            gh = ephy_embed_shell_get_global_history (EPHY_EMBED_SHELL (ephy_shell));
            icon = ephy_history_get_icon (gh, netscape_url[URL]);

            if (icon)
            {
                ephy_bookmarks_set_icon (bookmarks, netscape_url[URL], icon);
            }
        }

        g_strfreev (netscape_url);

        g_return_val_if_fail (node != NULL, NULL);

        return ephy_toolbars_model_get_action_name
            (model, ephy_node_get_id (node));
    }

    return EGG_TOOLBARS_MODEL_CLASS (parent_class)->get_item_id (t, type, name);
}

static char *
impl_get_item_type (EggToolbarsModel *t,
            GdkAtom type)
{
    if (gdk_atom_intern (EPHY_DND_TOPIC_TYPE, FALSE) == type)
    {
        return g_strdup (EPHY_DND_TOPIC_TYPE);
    }
    else if (gdk_atom_intern (EPHY_DND_URL_TYPE, FALSE) == type)
    {
        return g_strdup (EPHY_DND_URL_TYPE);
    }

    return EGG_TOOLBARS_MODEL_CLASS (parent_class)->get_item_type (t, type);
}

static gboolean
get_toolbar_and_item_pos (EphyToolbarsModel *model,
              const char *action_name,
              int *toolbar,
              int *position)
{
    int n_toolbars, n_items;
    int t,i;

    n_toolbars = egg_toolbars_model_n_toolbars (EGG_TOOLBARS_MODEL (model));

    for (t = 0; t < n_toolbars; t++)
    {
        n_items = egg_toolbars_model_n_items
                (EGG_TOOLBARS_MODEL (model), t);

        for (i = 0; i < n_items; i++)
        {
            const char *i_name;
            gboolean is_separator;

            i_name = egg_toolbars_model_item_nth
                    (EGG_TOOLBARS_MODEL (model), t, i,
                     &is_separator);
            g_return_val_if_fail (i_name != NULL, FALSE);

            if (strcmp (i_name, action_name) == 0)
            {
                if (toolbar) *toolbar = t;
                if (position) *position = i;

                return TRUE;
            }
        }
    }

    return FALSE;
}

static gboolean
impl_add_item (EggToolbarsModel    *t,
           int          toolbar_position,
           int          position,
           const char          *id,
           const char          *type)
{
    EphyToolbarsModel *model = EPHY_TOOLBARS_MODEL (t);
    gboolean is_bookmark;

    is_bookmark = strcmp (type, EPHY_DND_TOPIC_TYPE) == 0 ||
                  strcmp (type, EPHY_DND_URL_TYPE) == 0;

    if (!is_bookmark || !get_toolbar_and_item_pos (model, id, NULL, NULL))
    {
        return EGG_TOOLBARS_MODEL_CLASS (parent_class)->add_item
            (t, toolbar_position, position, id, type);
    }
    else
    {
        return FALSE;
    }
}

static void
connect_item (EphyToolbarsModel *model,
          const char *name)
{
    EphyNode *node;

    if (g_str_has_prefix (name, "GoBookmark-"))
    {
        node = ephy_toolbars_model_get_node (model, name);
        g_return_if_fail (node != NULL);

        ephy_node_signal_connect_object (node,
                             EPHY_NODE_DESTROY,
                             (EphyNodeCallback) bookmark_destroy_cb,
                             G_OBJECT (model));
    }
}

static void
ephy_toolbars_model_set_bookmarks (EphyToolbarsModel *model, EphyBookmarks *bookmarks)
{
    EggToolbarsModel *egg_model = EGG_TOOLBARS_MODEL (model);

    model->priv->bookmarks = bookmarks;
    g_object_ref (model->priv->bookmarks);

    model->priv->loading = TRUE;

    if (g_file_test (model->priv->xml_file, G_FILE_TEST_EXISTS))
    {
        egg_toolbars_model_load (egg_model,
                     model->priv->xml_file);
    }
    else
    {
        const char *default_xml;

        default_xml = ephy_file ("epiphany-toolbar.xml");
        egg_toolbars_model_load (egg_model, default_xml);
    }

    model->priv->loading = FALSE;
}

static void
ephy_toolbars_model_set_property (GObject *object,
                                  guint prop_id,
                                  const GValue *value,
                                  GParamSpec *pspec)
{
    EphyToolbarsModel *model;

    model = EPHY_TOOLBARS_MODEL (object);

    switch (prop_id)
    {
        case PROP_BOOKMARKS:
            ephy_toolbars_model_set_bookmarks (model, g_value_get_object (value));
            break;
    }
}

static void
ephy_toolbars_model_get_property (GObject *object,
                                  guint prop_id,
                                  GValue *value,
                                  GParamSpec *pspec)
{
    EphyToolbarsModel *model;

    model = EPHY_TOOLBARS_MODEL (object);

    switch (prop_id)
    {
        case PROP_BOOKMARKS:
            g_value_set_object (value, model->priv->bookmarks);
            break;
    }
}

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

    etm_class = EGG_TOOLBARS_MODEL_CLASS (klass);

    parent_class = g_type_class_peek_parent (klass);

    object_class->finalize = ephy_toolbars_model_finalize;
    object_class->set_property = ephy_toolbars_model_set_property;
    object_class->get_property = ephy_toolbars_model_get_property;

    etm_class->add_item = impl_add_item;
    etm_class->get_item_id = impl_get_item_id;
    etm_class->get_item_name = impl_get_item_name;
    etm_class->get_item_type = impl_get_item_type;

    g_object_class_install_property (object_class,
                                         PROP_BOOKMARKS,
                                         g_param_spec_object ("bookmarks",
                                                              "Bookmarks",
                                                              "Bookmarks",
                                                              EPHY_TYPE_BOOKMARKS,
                                                              G_PARAM_READWRITE));

    g_type_class_add_private (object_class, sizeof(EphyToolbarsModelPrivate));
}

static void
save_changes (EphyToolbarsModel *model)
{
    if (!model->priv->loading)
    {
        egg_toolbars_model_save (EGG_TOOLBARS_MODEL (model),
                     model->priv->xml_file,
                     EPHY_TOOLBARS_XML_VERSION);
    }
}

static void
item_added (EphyToolbarsModel *model, int toolbar_position, int position)
{
    const char *i_name;
    gboolean is_separator;

    i_name = egg_toolbars_model_item_nth
        (EGG_TOOLBARS_MODEL (model), toolbar_position,
         position, &is_separator);
    if (!is_separator)
    {
        connect_item (model, i_name);
    }

    save_changes (model);
}

static void
item_removed (EphyToolbarsModel *model, int toolbar_position, int position)
{
    save_changes (model);
}

static void
toolbar_added (EphyToolbarsModel *model, int position)
{
    save_changes (model);
}

static void
toolbar_removed (EphyToolbarsModel *model, int position)
{
    save_changes (model);
}

static void
ephy_toolbars_model_init (EphyToolbarsModel *t)
{
    t->priv = EPHY_TOOLBARS_MODEL_GET_PRIVATE (t);

    t->priv->bookmarks = NULL;
    t->priv->loading = FALSE;
    t->priv->xml_file = g_build_filename (ephy_dot_dir (),
                                              "epiphany-toolbars.xml",
                                              NULL);

    g_signal_connect (t, "item_added", G_CALLBACK (item_added), NULL);
    g_signal_connect (t, "item_removed", G_CALLBACK (item_removed), NULL);
    g_signal_connect (t, "toolbar_added", G_CALLBACK (toolbar_added), NULL);
    g_signal_connect (t, "toolbar_removed", G_CALLBACK (toolbar_removed), NULL);
}

static void
ephy_toolbars_model_finalize (GObject *object)
{
    EphyToolbarsModel *t = EPHY_TOOLBARS_MODEL (object);

    save_changes (t);

    g_object_unref (t->priv->bookmarks);

    g_free (t->priv->xml_file);

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

EphyToolbarsModel *
ephy_toolbars_model_new (EphyBookmarks *bookmarks)
{
    EphyToolbarsModel *t;

    t = EPHY_TOOLBARS_MODEL (g_object_new (EPHY_TYPE_TOOLBARS_MODEL,
                           "bookmarks", bookmarks,
                           NULL));

    g_return_val_if_fail (t->priv != NULL, NULL);

    return t;
}

static int
get_toolbar_pos (EphyToolbarsModel *model,
         const char *name)
{
    int i, n_toolbars;

    n_toolbars = egg_toolbars_model_n_toolbars
        (EGG_TOOLBARS_MODEL (model));

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

        t_name = egg_toolbars_model_toolbar_nth
            (EGG_TOOLBARS_MODEL (model), i);
        if (strcmp (name, t_name) == 0)
        {
            return i;
        }
    }

    return -1;
}

void
ephy_toolbars_model_remove_bookmark (EphyToolbarsModel *model,
                     long id)
{
    char *action_name;
    int toolbar, position;

    action_name = ephy_toolbars_model_get_action_name (model, id);
    g_return_if_fail (action_name != NULL);

    if (get_toolbar_and_item_pos (model, action_name, &toolbar, &position))
    {
        egg_toolbars_model_remove_item (EGG_TOOLBARS_MODEL (model),
                            toolbar, position);
    }

    g_free (action_name);
}

void
ephy_toolbars_model_add_bookmark (EphyToolbarsModel *model,
                  gboolean topic,
                  long id)
{
    char *name;
    int toolbar_position;

    toolbar_position = get_toolbar_pos (model, "BookmarksBar");
    g_return_if_fail (toolbar_position != -1);

    name = ephy_toolbars_model_get_action_name (model, id);
    egg_toolbars_model_add_item (EGG_TOOLBARS_MODEL (model),
                     toolbar_position, -1, name,
                     topic ? EPHY_DND_TOPIC_TYPE :
                         EPHY_DND_URL_TYPE);
    g_free (name);
}

gboolean
ephy_toolbars_model_has_bookmark (EphyToolbarsModel *model,
                  long id)
{
    char *action_name;
    gboolean found;
    int toolbar, pos;

    action_name = ephy_toolbars_model_get_action_name (model, id);
    g_return_val_if_fail (action_name != NULL, FALSE);

    found = get_toolbar_and_item_pos (model, action_name, &toolbar, &pos);

    g_free (action_name);

    return found;
}

void
ephy_toolbars_model_set_flag (EphyToolbarsModel *model,
                  EggTbModelFlags flags)
{
    EggToolbarsModel *t = EGG_TOOLBARS_MODEL (model);
    int i, n_toolbars;

    n_toolbars = egg_toolbars_model_n_toolbars
        (EGG_TOOLBARS_MODEL (model));

    for (i = 0; i < n_toolbars; i++)
    {
        EggTbModelFlags old_flags;

        old_flags = egg_toolbars_model_get_flags (t, i);

        egg_toolbars_model_set_flags (t, old_flags | flags, i);
    }
}

void
ephy_toolbars_model_unset_flag (EphyToolbarsModel *model,
                    EggTbModelFlags flags)
{
    EggToolbarsModel *t = EGG_TOOLBARS_MODEL (model);
    int i, n_toolbars;

    n_toolbars = egg_toolbars_model_n_toolbars
        (EGG_TOOLBARS_MODEL (model));

    for (i = 0; i < n_toolbars; i++)
    {
        EggTbModelFlags old_flags;

        old_flags = egg_toolbars_model_get_flags (t, i);

        egg_toolbars_model_set_flags (t, old_flags ^ flags, i);
    }
}