/* -*- Mode: C; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/*
 *  Copyright © 2000, 2001, 2002 Marco Pesenti Gritti
 *
 *  This file is part of Epiphany.
 *
 *  Epiphany 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 3 of the License, or
 *  (at your option) any later version.
 *
 *  Epiphany 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 Epiphany.  If not, see <http://www.gnu.org/licenses/>.
 */

#include "config.h"
#include "ephy-dnd.h"

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

/* Encode a "_NETSCAPE_URL_" selection.
 * As far as I can tell, Netscape is expecting a single
 * URL to be returned.  I cannot discover a way to construct
 * a list to be returned that Netscape can understand.
 * GMC also fails to do this as well.
 */
static void
add_one_netscape_url (const char *url,
                      const char *title,
                      gpointer    data)
{
  GString *result;

  result = (GString *)data;
  if (result->len == 0) {
    g_string_append (result, url);
    if (title) {
      g_string_append (result, "\n");
      g_string_append (result, title);
    }
  }
}

static void
add_one_uri (const char *uri,
             const char *title,
             gpointer    data)
{
  GString *result;

  result = (GString *)data;

  g_string_append (result, uri);
  g_string_append (result, "\r\n");
}

static void
add_one_topic (const char *uri,
               const char *title,
               gpointer    data)
{
  GString *result;

  result = (GString *)data;

  g_string_append (result, uri);
  g_string_append (result, "\r\n");
}

gboolean
ephy_dnd_drag_data_get (GtkWidget                        *widget,
                        GdkDragContext                   *context,
                        GtkSelectionData                 *selection_data,
                        guint32                           time,
                        gpointer                          container_context,
                        EphyDragEachSelectedItemIterator  each_selected_item_iterator)
{
  GString *result = NULL;
  GdkAtom target;

  target = gtk_selection_data_get_target (selection_data);

  if (target == gdk_atom_intern (EPHY_DND_URI_LIST_TYPE, FALSE) ||
      target == gdk_atom_intern (EPHY_DND_TEXT_TYPE, FALSE)) {
    result = g_string_new (NULL);
    (*each_selected_item_iterator)(add_one_uri, container_context, result);
  } else if (target == gdk_atom_intern (EPHY_DND_URL_TYPE, FALSE)) {
    result = g_string_new (NULL);
    (*each_selected_item_iterator)(add_one_netscape_url, container_context, result);
  } else if (target == gdk_atom_intern (EPHY_DND_TOPIC_TYPE, FALSE)) {
    result = g_string_new (NULL);
    (*each_selected_item_iterator)(add_one_topic, container_context, result);
    g_string_erase (result, result->len - 2, -1);
  } else {
    g_assert_not_reached ();
  }

  gtk_selection_data_set (selection_data,
                          target,
                          8, (const guchar *)result->str, result->len);

  g_string_free (result, TRUE);

  return TRUE;
}