/*
     This file is part of GNUnet.
     (C) 2010, 2011, 2012 Christian Grothoff (and other contributing authors)

     GNUnet 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.

     GNUnet 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 GNUnet; see the file COPYING.  If not, write to the
     Free Software Foundation, Inc., 59 Temple Place - Suite 330,
     Boston, MA 02111-1307, USA.
*/

/**
 * @file src/fs/gnunet-fs-gtk-main_window_meta_data_context_menu.c
 * @brief context menu for the 'meta data' tree view in the main window
 * @author Christian Grothoff
 */
#include "gnunet-fs-gtk.h"
#include "gnunet-fs-gtk-download.h"
#include "gnunet-fs-gtk-event_handler.h"
#include <string.h>



/**
 * Helper function of GNUNET_GTK_FS_metadata_copy_selection_activated
 * which copies the (selected) entries from the tree view to the
 * GList.
 *
 * @param model the tree model with the data
 * @param path unused
 * @param iter position in the model to access
 * @param user_data 'GList**' where we should store the types and values found
 */ 
static void
copy_metadata_to_clipboard (GtkTreeModel * model, GtkTreePath * path,
                            GtkTreeIter * iter, gpointer user_data)
{
  GList **l = user_data;
  gchar *type;
  gchar *value;

  gtk_tree_model_get (model, iter, 2, &type, 3, &value, -1);
  *l = g_list_prepend (*l, type);
  *l = g_list_prepend (*l, value);
}


/**
 * User activated metadata pop up menu "Copy selection" entry.
 *
 * @param menuitem the 'copy selection' menu item
 * @param user_data the GtkBuilder of the main window
 */
void
GNUNET_GTK_FS_metadata_copy_selection_activated (GtkMenuItem * menuitem, 
						 gpointer user_data)
{
  GtkBuilder *builder = GTK_BUILDER (user_data);
  GtkTreeView *tree;
  GtkClipboard *cb;
  GList *pairs;
  GList *pos;
  GList *value;
  GList *type;
  guint total_len;
  gchar *s;
  gchar *p;

  tree =
      GTK_TREE_VIEW (gtk_builder_get_object
                     (builder, "GNUNET_GTK_main_window_metadata_treeview"));
  pairs = NULL;
  gtk_tree_selection_selected_foreach (gtk_tree_view_get_selection (tree),
                                       &copy_metadata_to_clipboard, &pairs);
  if (NULL == pairs)
    return; /* nothing selected */
  total_len = 0;
  pairs = g_list_reverse (pairs);
  for (pos = pairs; NULL != pos; pos = value->next)
  {
    type = pos;
    value = pos->next;
    GNUNET_assert (NULL != value);
    total_len +=
      strlen ((gchar *) type->data) + strlen ((gchar *) value->data) +
      2 /* ": " */  + ((NULL != value->next) ? 1 : 0) /* "\n" */ ;
  }
  GNUNET_assert (total_len > 0);
  total_len++;             /* "\0" */
  s = g_new0 (gchar, total_len);
  if (NULL == s)
  {
    GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR, "malloc");
    return;
  }
  p = s;
  for (pos = pairs; NULL != pos; pos = value->next)
  {
    type = pos;
    value = pos->next;
    GNUNET_assert (NULL != value);
    p = g_stpcpy (p, (gchar *) type->data);
    p = g_stpcpy (p, ": ");
    p = g_stpcpy (p, (gchar *) value->data);
    if (NULL != value->next)
      p = g_stpcpy (p, "\n");        
  }
  g_list_foreach (pairs, (GFunc) &g_free, NULL);
  g_list_free (pairs);
  cb = gtk_clipboard_get (GDK_SELECTION_CLIPBOARD);
  gtk_clipboard_set_text (cb, s, -1);
  gtk_clipboard_store (cb);
  g_free (s);  
}


/**
 * Got asked to pop up the context menu in the metadata treeview in
 * the main window.  Do it.
 *
 * @param button which button caused the event (0 for none)
 * @param event_time time of the event (current time or 'event->time')
 * @param user_data the gtk builder of the main window
 */
static void
do_metadata_popup_menu (int button,
			int event_time,
                        GtkBuilder *builder)
{
  GtkMenu *menu;

  menu = GTK_MENU (gtk_builder_get_object (builder, "metadata_popup_menu"));
  gtk_menu_popup (menu, NULL, NULL, NULL, builder, button, event_time);
}


/**
 * Got a button press event on the metadata treeview in the main window.
 * If it was a right click, pop up the context menu.
 *
 * @param widget the tree view widget
 * @param user_data the gtk builder of the main window
 */
gboolean
GNUNET_GTK_main_window_metadata_treeview_button_press_event_cb (GtkWidget *
                                                                widget,
                                                                GdkEventButton *
                                                                event,
                                                                gpointer
                                                                user_data)
{
  GtkBuilder *builder = GTK_BUILDER (user_data);

  /* Ignore double-clicks and triple-clicks */
  if ( (event->button != 3) || (event->type != GDK_BUTTON_PRESS) )
    return FALSE;
  do_metadata_popup_menu (event->button,
			  event->time,
			  builder);
  return TRUE;
}


/**
 * Metadata treeview in the main window got the 'popup-menu' signal.
 * Pop up the menu.
 *
 * @param widget the tree view widget
 * @param user_data the gtk builder of the main window
 */
gboolean
GNUNET_GTK_main_window_metadata_treeview_popup_menu_cb (GtkWidget * widget,
                                                        gpointer user_data)
{
  GtkBuilder *builder = GTK_BUILDER (user_data);

  do_metadata_popup_menu (0 /* no button */,
			  gtk_get_current_event_time (),
			  builder);
  return TRUE;
}

/* end of gnunet-fs-gtk-meta_data_context_menu.c */