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// Copyright 2013-2017, The Gtk-rs Project Developers.
// See the COPYRIGHT file at the top-level directory of this distribution.
// Licensed under the MIT license, see the LICENSE file or <http://opensource.org/licenses/MIT>

use glib;
use glib::object::IsA;
use glib::translate::*;
use gtk_sys;
use libc::c_int;
use TreeIter;
use TreePath;
use TreeRowReference;

impl TreeRowReference {
    // This is unsafe because new_order bounds can't be checked.
    /// Lets a set of row reference created by
    /// `TreeRowReference::new_proxy` know that the
    /// model emitted the `TreeModel::rows-reordered` signal.
    /// ## `proxy`
    /// a `gobject::Object`
    /// ## `path`
    /// the parent path of the reordered signal
    /// ## `iter`
    /// the iter pointing to the parent of the reordered
    /// ## `new_order`
    /// the new order of rows
    ///
    /// # Safety
    /// The `proxy` must be a proxy returned by `gtk::TreeRowReference` and
    /// the `new_order` bounds **must** be valid as they cannot be checked.
    pub unsafe fn reordered<T: IsA<glib::Object>>(
        proxy: &T,
        path: &TreePath,
        iter: Option<&TreeIter>,
        new_order: &[u32],
    ) {
        assert_initialized_main_thread!();
        assert!(
            iter.is_some() || path.get_depth() == 0,
            "If 'iter' is None, 'path' must point to the root."
        );
        gtk_sys::gtk_tree_row_reference_reordered(
            proxy.as_ref().to_glib_none().0,
            mut_override(path.to_glib_none().0),
            mut_override(iter.to_glib_none().0),
            mut_override(new_order.as_ptr() as *const c_int),
        );
    }
}