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// This file was generated by gir (https://github.com/gtk-rs/gir)
// from gir-files (https://github.com/gtk-rs/gir-files)
// DO NOT EDIT

use crate::MenuModel;
use glib::{prelude::*, translate::*};
use std::{fmt, ptr};

glib::wrapper! {
    /// [`MenuLinkIter`][crate::MenuLinkIter] is an opaque structure type. You must access it using
    /// the functions below.
    ///
    /// This is an Abstract Base Class, you cannot instantiate it.
    ///
    /// # Implements
    ///
    /// [`MenuLinkIterExt`][trait@crate::prelude::MenuLinkIterExt], [`trait@glib::ObjectExt`]
    #[doc(alias = "GMenuLinkIter")]
    pub struct MenuLinkIter(Object<ffi::GMenuLinkIter, ffi::GMenuLinkIterClass>);

    match fn {
        type_ => || ffi::g_menu_link_iter_get_type(),
    }
}

impl MenuLinkIter {
    pub const NONE: Option<&'static MenuLinkIter> = None;
}

/// Trait containing all [`struct@MenuLinkIter`] methods.
///
/// # Implementors
///
/// [`MenuLinkIter`][struct@crate::MenuLinkIter]
pub trait MenuLinkIterExt: 'static {
    /// This function combines `g_menu_link_iter_next()` with
    /// `g_menu_link_iter_get_name()` and `g_menu_link_iter_get_value()`.
    ///
    /// First the iterator is advanced to the next (possibly first) link.
    /// If that fails, then [`false`] is returned and there are no other effects.
    ///
    /// If successful, `out_link` and `value` are set to the name and [`MenuModel`][crate::MenuModel]
    /// of the link that has just been advanced to. At this point,
    /// `g_menu_link_iter_get_name()` and `g_menu_link_iter_get_value()` will return the
    /// same values again.
    ///
    /// The value returned in `out_link` remains valid for as long as the iterator
    /// remains at the current position. The value returned in `value` must
    /// be unreffed using `g_object_unref()` when it is no longer in use.
    ///
    /// # Returns
    ///
    /// [`true`] on success, or [`false`] if there is no additional link
    ///
    /// ## `out_link`
    /// the name of the link
    ///
    /// ## `value`
    /// the linked [`MenuModel`][crate::MenuModel]
    #[doc(alias = "g_menu_link_iter_get_next")]
    #[doc(alias = "get_next")]
    fn next(&self) -> Option<(glib::GString, MenuModel)>;
}

impl<O: IsA<MenuLinkIter>> MenuLinkIterExt for O {
    fn next(&self) -> Option<(glib::GString, MenuModel)> {
        unsafe {
            let mut out_link = ptr::null();
            let mut value = ptr::null_mut();
            let ret = from_glib(ffi::g_menu_link_iter_get_next(
                self.as_ref().to_glib_none().0,
                &mut out_link,
                &mut value,
            ));
            if ret {
                Some((from_glib_none(out_link), from_glib_full(value)))
            } else {
                None
            }
        }
    }
}

impl fmt::Display for MenuLinkIter {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        f.write_str("MenuLinkIter")
    }
}