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>

static gboolean
directory_delete_recursive (GFile *directory, GError **error)
{
  GFileEnumerator *enumerator;
  GFileInfo *info;
  gboolean success = TRUE;

  enumerator = g_file_enumerate_children (directory,
                                          G_FILE_ATTRIBUTE_STANDARD_NAME ","
                                          G_FILE_ATTRIBUTE_STANDARD_TYPE,
                                          G_FILE_QUERY_INFO_NONE,
                                          NULL, error);
  if (enumerator == NULL)
    return FALSE;

  while (success &&
         (info = g_file_enumerator_next_file (enumerator, NULL, NULL))) {
    GFile *child;

    child = g_file_get_child (directory, g_file_info_get_name (info));

    if (g_file_info_get_file_type (info) == G_FILE_TYPE_DIRECTORY) {
      success = directory_delete_recursive (child, error);
    }
    g_object_unref (info);

    if (success)
      success = g_file_delete (child, NULL, error);
  }
  g_file_enumerator_close (enumerator, NULL, NULL);

  return success;
}

static gboolean
file_delete_recursive (GFile *file, GError **error)
{
  GFileInfo *info;
  GFileType type;

  g_return_val_if_fail (error == NULL || *error == NULL, FALSE);

  info = g_file_query_info (file,
                            G_FILE_ATTRIBUTE_STANDARD_TYPE,
                            G_FILE_QUERY_INFO_NONE,
                            NULL, error);
  if (info == NULL)
    return FALSE;

  type = g_file_info_get_file_type (info);
  g_object_unref (info);

  if (type == G_FILE_TYPE_DIRECTORY)
    return directory_delete_recursive (file, error);
  else
    return g_file_delete (file, NULL, error);
}

gboolean
theme_is_writable (const gpointer theme)
{
  GnomeThemeCommonInfo *info = theme;
  GFile *file;
  GFileInfo *file_info;
  gboolean writable;

  if (info == NULL || info->path == NULL)
    return FALSE;

  file = g_file_new_for_uri (info->path);
  file_info = g_file_query_info (file,
                                 G_FILE_ATTRIBUTE_ACCESS_CAN_WRITE,
                                 G_FILE_QUERY_INFO_NONE,
                                 NULL, NULL);
  g_object_unref (file);

  if (file_info == NULL)
    return FALSE;

  writable = g_file_info_get_attribute_boolean (file_info,
                                                G_FILE_ATTRIBUTE_ACCESS_CAN_WRITE);
  g_object_unref (file_info);

  return writable;
}

gboolean
theme_delete (const gchar *name, ThemeType type)
{
  gboolean rc;
  GtkDialog *dialog;
  gchar *theme_dir;
  gint response;
  GnomeThemeCommonInfo *theme;
  GFile *dir;

  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 = (GnomeThemeCommonInfo *) gnome_theme_info_find (name);
      theme_dir = g_build_filename (theme->path, "gtk-2.0", NULL);
      break;

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

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

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

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

    default:
      return FALSE;
  }

  dir = g_file_new_for_uri (theme_dir);
  g_free (theme_dir);

  if (!file_delete_recursive (dir, NULL)) {
    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 */
    GFile *parent = g_file_get_parent (dir);
    g_file_delete (parent, NULL, NULL);
    g_object_unref (parent);
    rc = TRUE;
  }

  g_object_unref (dir);
  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;
}