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diff --git a/gedit/gedit-style-scheme-manager.c b/gedit/gedit-style-scheme-manager.c
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+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
+/*
+ * gedit-source-style-manager.c
+ *
+ * Copyright (C) 2007 - Paolo Borelli and Paolo Maggi
+ *
+ * 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., 59 Temple Place, Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+/*
+ * Modified by the gedit Team, 2007. See the AUTHORS file for a
+ * list of people on the gedit Team.
+ * See the ChangeLog files for a list of changes.
+ *
+ * $Id$
+ */
+
+#include <string.h>
+#include <errno.h>
+
+#include <glib/gi18n.h>
+#include <glib/gstdio.h>
+
+#include "gedit-style-scheme-manager.h"
+#include "gedit-prefs-manager.h"
+#include "gedit-dirs.h"
+
+static GtkSourceStyleSchemeManager *style_scheme_manager = NULL;
+
+static gchar *
+get_gedit_styles_path (void)
+{
+	gchar *config_dir;
+	gchar *dir = NULL;
+
+	config_dir = gedit_dirs_get_user_config_dir ();
+
+	if (config_dir != NULL)
+	{
+		dir = g_build_filename (config_dir,
+					"styles",
+					NULL);
+		g_free (config_dir);
+	}
+	
+	return dir;
+}
+
+static void
+add_gedit_styles_path (GtkSourceStyleSchemeManager *mgr)
+{
+	gchar *dir;
+
+	dir = get_gedit_styles_path();
+
+	if (dir != NULL)
+	{
+		gtk_source_style_scheme_manager_append_search_path (mgr, dir);
+		g_free (dir);
+	}	
+}
+
+GtkSourceStyleSchemeManager *
+gedit_get_style_scheme_manager (void)
+{
+	if (style_scheme_manager == NULL)
+	{
+		style_scheme_manager = gtk_source_style_scheme_manager_new ();
+		add_gedit_styles_path (style_scheme_manager);
+	}
+
+	return style_scheme_manager;
+}
+
+static gint
+schemes_compare (gconstpointer a, gconstpointer b)
+{
+	GtkSourceStyleScheme *scheme_a = (GtkSourceStyleScheme *)a;
+	GtkSourceStyleScheme *scheme_b = (GtkSourceStyleScheme *)b;
+
+	const gchar *name_a = gtk_source_style_scheme_get_name (scheme_a);
+	const gchar *name_b = gtk_source_style_scheme_get_name (scheme_b);
+
+	return g_utf8_collate (name_a, name_b);
+}
+
+GSList *
+gedit_style_scheme_manager_list_schemes_sorted (GtkSourceStyleSchemeManager *manager)
+{
+	const gchar * const * scheme_ids;
+	GSList *schemes = NULL;
+
+	g_return_val_if_fail (GTK_IS_SOURCE_STYLE_SCHEME_MANAGER (manager), NULL);
+
+	scheme_ids = gtk_source_style_scheme_manager_get_scheme_ids (manager);
+	
+	while (*scheme_ids != NULL)
+	{
+		GtkSourceStyleScheme *scheme;
+
+		scheme = gtk_source_style_scheme_manager_get_scheme (manager, 
+								     *scheme_ids);
+
+		schemes = g_slist_prepend (schemes, scheme);
+
+		++scheme_ids;
+	}
+
+	if (schemes != NULL)
+		schemes = g_slist_sort (schemes, (GCompareFunc)schemes_compare);
+
+	return schemes;
+}
+
+gboolean
+_gedit_style_scheme_manager_scheme_is_gedit_user_scheme (GtkSourceStyleSchemeManager *manager,
+							 const gchar                 *scheme_id)
+{
+	GtkSourceStyleScheme *scheme;
+	const gchar *filename;
+	gchar *dir;
+	gboolean res = FALSE;
+
+	scheme = gtk_source_style_scheme_manager_get_scheme (manager, scheme_id);
+	if (scheme == NULL)
+		return FALSE;
+
+	filename = gtk_source_style_scheme_get_filename (scheme);
+	if (filename == NULL)
+		return FALSE;
+
+	dir = get_gedit_styles_path ();
+
+	res = g_str_has_prefix (filename, dir);
+
+	g_free (dir);
+
+	return res;
+}
+
+/**
+ * file_copy:
+ * @name: a pointer to a %NULL-terminated string, that names
+ * the file to be copied, in the GLib file name encoding
+ * @dest_name: a pointer to a %NULL-terminated string, that is the
+ * name for the destination file, in the GLib file name encoding
+ * @error: return location for a #GError, or %NULL
+ *
+ * Copies file @name to @dest_name.
+ *
+ * If the call was successful, it returns %TRUE. If the call was not
+ * successful, it returns %FALSE and sets @error. The error domain
+ * is #G_FILE_ERROR. Possible error
+ * codes are those in the #GFileError enumeration.
+ *
+ * Return value: %TRUE on success, %FALSE otherwise.
+ */
+static gboolean
+file_copy (const gchar  *name,
+	   const gchar  *dest_name,
+	   GError      **error)
+{
+	gchar *contents;
+	gsize length;
+	gchar *dest_dir;
+
+	/* FIXME - Paolo (Aug. 13, 2007):
+	 * Since the style scheme files are relatively small, we can implement
+	 * file copy getting all the content of the source file in a buffer and
+	 * then write the content to the destination file. In this way we
+	 * can use the g_file_get_contents and g_file_set_contents and avoid to
+	 * write custom code to copy the file (with sane error management).
+	 * If needed we can improve this code later. */
+
+	g_return_val_if_fail (name != NULL, FALSE);
+	g_return_val_if_fail (dest_name != NULL, FALSE);
+	g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
+
+	/* Note: we allow to copy a file to itself since this is not a problem
+	 * in our use case */
+
+	/* Ensure the destination directory exists */
+	dest_dir = g_path_get_dirname (dest_name);
+
+	errno = 0;
+	if (g_mkdir_with_parents (dest_dir, 0755) != 0)
+	{
+		gint save_errno = errno;
+		gchar *display_filename = g_filename_display_name (dest_dir);
+
+		g_set_error (error,
+			     G_FILE_ERROR,
+			     g_file_error_from_errno (save_errno),
+			     _("Directory '%s' could not be created: g_mkdir_with_parents() failed: %s"),
+			     display_filename,
+			     g_strerror (save_errno));
+
+		g_free (dest_dir);
+		g_free (display_filename);
+
+		return FALSE;
+	}
+
+	g_free (dest_dir);
+
+	if (!g_file_get_contents (name, &contents, &length, error))
+		return FALSE;
+
+	if (!g_file_set_contents (dest_name, contents, length, error))
+		return FALSE;
+
+	g_free (contents);
+
+	return TRUE;
+}
+
+/**
+ * _gedit_style_scheme_manager_install_scheme:
+ * @manager: a #GtkSourceStyleSchemeManager
+ * @fname: the file name of the style scheme to be installed
+ *
+ * Install a new user scheme.
+ * This function copies @fname in #GEDIT_STYLES_DIR and ask the style manager to
+ * recompute the list of available style schemes. It then checks if a style
+ * scheme with the right file name exists.
+ *
+ * If the call was succesful, it returns the id of the installed scheme
+ * otherwise %NULL.
+ *
+ * Return value: the id of the installed scheme, %NULL otherwise.
+ */
+const gchar *
+_gedit_style_scheme_manager_install_scheme (GtkSourceStyleSchemeManager *manager,
+					    const gchar                 *fname)
+{
+	gchar *new_file_name = NULL;
+	gchar *dirname;
+	gchar *styles_dir;
+	GError *error = NULL;
+	gboolean copied = FALSE;
+
+	const gchar* const *ids;
+
+	g_return_val_if_fail (GTK_IS_SOURCE_STYLE_SCHEME_MANAGER (manager), NULL);
+	g_return_val_if_fail (fname != NULL, NULL);
+
+	dirname = g_path_get_dirname (fname);
+	styles_dir = get_gedit_styles_path();
+
+	if (strcmp (dirname, styles_dir) != 0)
+	{
+		gchar *basename;
+
+		basename = g_path_get_basename (fname);
+		new_file_name = g_build_filename (styles_dir, basename, NULL);
+		g_free (basename);
+
+		/* Copy the style scheme file into GEDIT_STYLES_DIR */
+		if (!file_copy (fname, new_file_name, &error))
+		{
+			g_free (new_file_name);
+
+			g_message ("Cannot install style scheme:\n%s",
+				   error->message);
+
+			return NULL;
+		}
+
+		copied = TRUE;
+	}
+	else
+	{
+		new_file_name = g_strdup (fname);
+	}
+
+	g_free (dirname);
+	g_free (styles_dir);
+
+	/* Reload the available style schemes */
+	gtk_source_style_scheme_manager_force_rescan (manager);
+
+	/* Check the new style scheme has been actually installed */
+	ids = gtk_source_style_scheme_manager_get_scheme_ids (manager);
+
+	while (*ids != NULL)
+	{
+		GtkSourceStyleScheme *scheme;
+		const gchar *filename;
+
+		scheme = gtk_source_style_scheme_manager_get_scheme (
+				gedit_get_style_scheme_manager (), *ids);
+
+		filename = gtk_source_style_scheme_get_filename (scheme);
+
+		if (filename && (strcmp (filename, new_file_name) == 0))
+		{
+			/* The style scheme has been correctly installed */
+			g_free (new_file_name);
+
+			return gtk_source_style_scheme_get_id (scheme);
+		}
+		++ids;
+	}
+
+	/* The style scheme has not been correctly installed */
+	if (copied)
+		g_unlink (new_file_name);
+
+	g_free (new_file_name);
+
+	return NULL;
+}
+
+/**
+ * _gedit_style_scheme_manager_uninstall_scheme:
+ * @manager: a #GtkSourceStyleSchemeManager
+ * @id: the id of the style scheme to be uninstalled
+ *
+ * Uninstall a user scheme.
+ *
+ * If the call was succesful, it returns %TRUE
+ * otherwise %FALSE.
+ *
+ * Return value: %TRUE on success, %FALSE otherwise.
+ */
+gboolean
+_gedit_style_scheme_manager_uninstall_scheme (GtkSourceStyleSchemeManager *manager,
+					      const gchar                 *id)
+{
+	GtkSourceStyleScheme *scheme;
+	const gchar *filename;
+
+	g_return_val_if_fail (GTK_IS_SOURCE_STYLE_SCHEME_MANAGER (manager), FALSE);
+	g_return_val_if_fail (id != NULL, FALSE);
+
+	scheme = gtk_source_style_scheme_manager_get_scheme (manager, id);
+	if (scheme == NULL)
+		return FALSE;
+
+	filename = gtk_source_style_scheme_get_filename (scheme);
+	if (filename == NULL)
+		return FALSE;
+
+	if (g_unlink (filename) == -1)
+		return FALSE;
+		
+	/* Reload the available style schemes */
+	gtk_source_style_scheme_manager_force_rescan (manager);
+	
+	return TRUE;	
+}