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// Copyright 2018, 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::translate::*;
use glib_sys;
use pango_sys;
use AttrIterator;
use Attribute;
use FontDescription;
use Language;

use std::ptr;

impl AttrIterator {
    pub fn get_font(
        &mut self,
        desc: &mut FontDescription,
        language: Option<&Language>,
        extra_attrs: &[&Attribute],
    ) {
        unsafe {
            let stash_vec: Vec<_> = extra_attrs.iter().rev().map(|v| v.to_glib_none()).collect();
            let mut list: *mut glib_sys::GSList = ptr::null_mut();
            for stash in &stash_vec {
                list = glib_sys::g_slist_prepend(list, Ptr::to(stash.0));
            }

            pango_sys::pango_attr_iterator_get_font(
                self.to_glib_none_mut().0,
                desc.to_glib_none_mut().0,
                &mut language.to_glib_none().0,
                &mut list,
            );
        }
    }
}