gnome-control-center/capplets/appearance/theme-util.c

/*
 * Copyright (C) 2007 The GNOME Foundation
 * Written by Thomas Wood <thos@gnome.org>
 *            Jens Granseuer <jensgr@gmx.net>
 * All Rights Reserved
 *
 * 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 "appearance.h"
#include "theme-util.h"

#include <glib/gi18n.h>
#include <string.h>

gboolean
theme_is_writable (const gpointer theme, ThemeType type)
{
  GnomeVFSResult vfs_result;
  GnomeVFSFileInfo *vfs_info;
  const gchar *theme_path;
  gboolean writable;

  if (theme == NULL)
    return FALSE;

  switch (type) {
    case THEME_TYPE_GTK:
    case THEME_TYPE_WINDOW:
      theme_path = ((const GnomeThemeInfo *) theme)->path;
      break;
    case THEME_TYPE_ICON:
      theme_path = ((const GnomeThemeIconInfo *) theme)->path;
      break;
    case THEME_TYPE_CURSOR:
      theme_path = ((const GnomeThemeCursorInfo *) theme)->path;
      break;
    case THEME_TYPE_META:
      theme_path = ((const GnomeThemeMetaInfo *) theme)->path;
      break;
    default:
      g_assert_not_reached ();
      break;
  }

  if (theme_path == NULL)
    return FALSE;

  vfs_info = gnome_vfs_file_info_new ();
  vfs_result = gnome_vfs_get_file_info (theme_path,
					vfs_info,
					GNOME_VFS_FILE_INFO_GET_ACCESS_RIGHTS);

  writable = ((vfs_result == GNOME_VFS_OK) &&
              (vfs_info->valid_fields & GNOME_VFS_FILE_INFO_FIELDS_ACCESS) &&
              (vfs_info->permissions & GNOME_VFS_PERM_ACCESS_WRITABLE));

  gnome_vfs_file_info_unref (vfs_info);

  return writable;
}

gboolean
theme_delete (const gchar *name, ThemeType type)
{
  gboolean rc;
  GtkDialog *dialog;
  gpointer theme;
  gchar *theme_dir;
  gint response;
  GList *uri_list;
  GnomeVFSResult result;
  GnomeVFSURI *uri;

  dialog = (GtkDialog *) gtk_message_dialog_new (NULL,
						 GTK_DIALOG_MODAL,
						 GTK_MESSAGE_QUESTION,
						 GTK_BUTTONS_CANCEL,
						 _("Would you like to delete this theme?"));
  gtk_dialog_add_button (dialog, GTK_STOCK_DELETE, GTK_RESPONSE_ACCEPT);
  response = gtk_dialog_run (dialog);
  gtk_widget_destroy (GTK_WIDGET (dialog));
  if (response == GTK_RESPONSE_CANCEL)
    return FALSE;

  switch (type) {
    case THEME_TYPE_GTK:
      theme = gnome_theme_info_find (name);
      theme_dir = g_build_filename (((GnomeThemeInfo *) theme)->path, "gtk-2.0", NULL);
      break;

    case THEME_TYPE_ICON:
      theme = gnome_theme_icon_info_find (name);
      theme_dir = g_path_get_dirname (((GnomeThemeIconInfo *) theme)->path);
      break;

    case THEME_TYPE_WINDOW:
      theme = gnome_theme_info_find (name);
      theme_dir = g_build_filename (((GnomeThemeInfo *) theme)->path, "metacity-1", NULL);
      break;

    case THEME_TYPE_META:
      theme = gnome_theme_meta_info_find (name);
      theme_dir = g_strdup (((GnomeThemeMetaInfo *) theme)->path);
      break;

    case THEME_TYPE_CURSOR:
      theme = gnome_theme_cursor_info_find (name);
      theme_dir = g_build_filename (((GnomeThemeCursorInfo *) theme)->path, "cursors", NULL);
      break;

    default:
      return FALSE;
  }

  uri = gnome_vfs_uri_new (theme_dir);
  g_free (theme_dir);

  uri_list = g_list_prepend (NULL, uri);

  result = gnome_vfs_xfer_delete_list (uri_list,
				       GNOME_VFS_XFER_ERROR_MODE_ABORT,
				       GNOME_VFS_XFER_RECURSIVE,
				       NULL, NULL);

  if (result != GNOME_VFS_OK) {
    GtkWidget *info_dialog = gtk_message_dialog_new (NULL,
						     GTK_DIALOG_MODAL,
						     GTK_MESSAGE_ERROR,
						     GTK_BUTTONS_OK,
						     _("Theme cannot be deleted"));
    gtk_dialog_run (GTK_DIALOG (info_dialog));
    gtk_widget_destroy (info_dialog);
    rc = FALSE;
  } else {
    /* also delete empty parent directories */
    GnomeVFSURI *parent = gnome_vfs_uri_get_parent (uri);
    gnome_vfs_remove_directory_from_uri (parent);
    gnome_vfs_uri_unref (parent);
    rc = TRUE;
  }

  gnome_vfs_uri_list_free (uri_list);

  return rc;
}

gboolean
theme_model_iter_last (GtkTreeModel *model, GtkTreeIter *iter)
{
  GtkTreeIter walk, prev;
  gboolean valid;

  valid = gtk_tree_model_get_iter_first (model, &walk);

  if (valid) {
    do {
      prev = walk;
      valid = gtk_tree_model_iter_next (model, &walk);
    } while (valid);

    *iter = prev;
    return TRUE;
  }
  return FALSE;
}

gboolean
theme_find_in_model (GtkTreeModel *model, const gchar *name, GtkTreeIter *iter)
{
  GtkTreeIter walk;
  gboolean valid;
  gchar *test;

  if (!name)
    return FALSE;

  for (valid = gtk_tree_model_get_iter_first (model, &walk); valid;
       valid = gtk_tree_model_iter_next (model, &walk))
  {
    gtk_tree_model_get (model, &walk, COL_NAME, &test, -1);

    if (test) {
      gint cmp = strcmp (test, name);
      g_free (test);

      if (!cmp) {
      	if (iter)
          *iter = walk;
        return TRUE;
      }
    }
  }

  return FALSE;
}