path: root/lib/widgets/ephy-tree-model-sort.c

/*  Rhythmbox.
 *  Copyright © 2002 Olivier Martin <omartin@ifrance.com>
 *
 *  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 Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 */

#include "config.h"

#include <gtk/gtk.h>
#include <string.h>

#include "ephy-node.h"
#include "ephy-tree-model-sort.h"
#include "eggtreemultidnd.h"
#include "ephy-dnd.h"
#include "ephy-debug.h"

/**
 * SECTION:ephy-tree-model-sort
 * @short_description: A #GtkTreeModelSort wrapper
 *
 * #EphyTreeModelSort is a simple wrapper for models, it implements some extra
 * functionalities like drag and dropping, mostly relevant to Epiphany only.
 */

static void ephy_tree_model_sort_class_init (EphyTreeModelSortClass *klass);
static void ephy_tree_model_sort_init (EphyTreeModelSort *ma);
static void ephy_tree_model_sort_finalize (GObject *object);
static void ephy_tree_model_sort_multi_drag_source_init (EggTreeMultiDragSourceIface *iface);
static gboolean ephy_tree_model_sort_multi_row_draggable (EggTreeMultiDragSource *drag_source,
                              GList *path_list);
static gboolean ephy_tree_model_sort_multi_drag_data_get (EggTreeMultiDragSource *drag_source,
                              GList *path_list,
                              GtkSelectionData *selection_data);
static gboolean ephy_tree_model_sort_multi_drag_data_delete (EggTreeMultiDragSource *drag_source,
                                 GList *path_list);

#define EPHY_TREE_MODEL_SORT_GET_PRIVATE(object)(G_TYPE_INSTANCE_GET_PRIVATE ((object), EPHY_TYPE_TREE_MODEL_SORT, EphyTreeModelSortPrivate))

struct _EphyTreeModelSortPrivate
{
    char *str_list;
    int base_drag_column_id;
    int extra_drag_column_id;
};

static GObjectClass *parent_class = NULL;

GType
ephy_tree_model_sort_get_type (void)
{
    static GType type = 0;

    if (G_UNLIKELY (type == 0))
    {
        const GTypeInfo our_info =
        {
            sizeof (EphyTreeModelSortClass),
            NULL, /* base init */
            NULL, /* base finalize */
            (GClassInitFunc) ephy_tree_model_sort_class_init,
            NULL, /* class finalize */
            NULL, /* class data */
            sizeof (EphyTreeModelSort),
            0, /* n_preallocs */
            (GInstanceInitFunc) ephy_tree_model_sort_init
        };
        const GInterfaceInfo multi_drag_source_info =
        {
            (GInterfaceInitFunc) ephy_tree_model_sort_multi_drag_source_init,
            NULL,
            NULL
        };

        type = g_type_register_static (GTK_TYPE_TREE_MODEL_SORT,
                           "EphyTreeModelSort",
                           &our_info, 0);

        g_type_add_interface_static (type,
                         EGG_TYPE_TREE_MULTI_DRAG_SOURCE,
                         &multi_drag_source_info);
    }

    return type;
}

static void
ephy_tree_model_sort_class_init (EphyTreeModelSortClass *klass)
{
    GObjectClass *object_class = G_OBJECT_CLASS (klass);

    parent_class = g_type_class_peek_parent (klass);

    object_class->finalize = ephy_tree_model_sort_finalize;

    g_type_class_add_private (object_class, sizeof (EphyTreeModelSortPrivate));
}

static void
ephy_tree_model_sort_init (EphyTreeModelSort *ma)
{
    ma->priv = EPHY_TREE_MODEL_SORT_GET_PRIVATE (ma);

    ma->priv->base_drag_column_id = -1;
    ma->priv->extra_drag_column_id = -1;
}

static void
ephy_tree_model_sort_finalize (GObject *object)
{
    EphyTreeModelSort *model = EPHY_TREE_MODEL_SORT (object);

    g_free (model->priv->str_list);

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

/**
 * ephy_tree_model_sort_new:
 * @child_model: model to wrap
 *
 * Creates a new #EphyTreeModelSort around @child_model.
 *
 * Returns: a new #EphyTreeModelSort, as a #GtkWidget
 **/
GtkTreeModel*
ephy_tree_model_sort_new (GtkTreeModel *child_model)
{
    GtkTreeModel *model;

    g_return_val_if_fail (child_model != NULL, NULL);

    model = GTK_TREE_MODEL (g_object_new (EPHY_TYPE_TREE_MODEL_SORT,
                          "model", child_model,
                          NULL));

    return model;
}

static void
ephy_tree_model_sort_multi_drag_source_init (EggTreeMultiDragSourceIface *iface)
{
    iface->row_draggable    = ephy_tree_model_sort_multi_row_draggable;
    iface->drag_data_get    = ephy_tree_model_sort_multi_drag_data_get;
    iface->drag_data_delete = ephy_tree_model_sort_multi_drag_data_delete;
}

static gboolean
ephy_tree_model_sort_multi_row_draggable (EggTreeMultiDragSource *drag_source, GList *path_list)
{
    return (EPHY_TREE_MODEL_SORT (drag_source)->priv->base_drag_column_id >= 0);
}

/**
 * ephy_tree_model_sort_set_base_drag_column_id:
 * @ms: an #EphyTreeModelSort
 * @id: base drag column id
 *
 * Sets @id as the column for the base drag data
 **/
void
ephy_tree_model_sort_set_base_drag_column_id (EphyTreeModelSort *ms,
                              int id)
{
    ms->priv->base_drag_column_id = id;
}

/**
 * ephy_tree_model_sort_set_extra_drag_column_id:
 * @ms: an #EphyTreeModelSort
 * @id: extra drag column id
 *
 * Sets @id as the column for extra drag data.
 **/
void
ephy_tree_model_sort_set_extra_drag_column_id (EphyTreeModelSort *ms,
                           int id)
{
    ms->priv->extra_drag_column_id = id;
}

static gboolean
ephy_tree_model_sort_multi_drag_data_delete (EggTreeMultiDragSource *drag_source,
                         GList *path_list)
{
    return TRUE;
}

static void
each_property_get_data_binder (EphyDragEachSelectedItemDataGet iteratee,
                   gpointer iterator_context, gpointer data)
{
    gpointer *context = (gpointer *) iterator_context;
    GList *path_list = (GList *) (context[0]);
    GList *i;
    EphyTreeModelSort *model = EPHY_TREE_MODEL_SORT (context[1]);
    GValue base_value = {0, }, extra_value = {0, };

    for (i = path_list; i != NULL; i = i->next)
    {
        GtkTreeIter iter;
        GtkTreePath *path = NULL;
        const char *base_data, *extra_data;

        path = gtk_tree_row_reference_get_path (i->data);
        gtk_tree_model_get_iter (GTK_TREE_MODEL (model), &iter, path);

        gtk_tree_model_get_value (GTK_TREE_MODEL (model), &iter,
                      model->priv->base_drag_column_id,
                      &base_value);
        base_data = g_value_get_string (&base_value);

        if (model->priv->extra_drag_column_id >= 0) {
            gtk_tree_model_get_value (GTK_TREE_MODEL (model), &iter,
                          model->priv->extra_drag_column_id,
                          &extra_value);
            extra_data = g_value_get_string (&extra_value);
        } else
            extra_data = NULL;

        g_return_if_fail (base_data != NULL);

        LOG ("Data get %s (%s)", base_data, extra_data);

        iteratee (base_data, extra_data, data);

        gtk_tree_path_free (path);
        g_value_unset (&base_value);

        if (model->priv->extra_drag_column_id >= 0)
            g_value_unset (&extra_value);
    }
}

static gboolean
ephy_tree_model_sort_multi_drag_data_get (EggTreeMultiDragSource *drag_source,
                      GList *path_list,
                      GtkSelectionData *selection_data)
{
    gpointer icontext[2];

    icontext[0] = path_list;
    icontext[1] = drag_source;

    ephy_dnd_drag_data_get (NULL, NULL, selection_data,
                0, &icontext, each_property_get_data_binder);

    return TRUE;
}