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// Take a look at the license at the top of the repository in the LICENSE file.

use crate::IconTheme;
use glib::{translate::*, IntoGStr, Slice};

impl IconTheme {
    /// Returns an array of integers describing the sizes at which
    /// the icon is available without scaling.
    ///
    /// A size of -1 means that the icon is available in a scalable
    /// format. The array is zero-terminated.
    /// ## `icon_name`
    /// the name of an icon
    ///
    /// # Returns
    ///
    /// A newly
    ///   allocated array describing the sizes at which the icon is
    ///   available. The array should be freed with g_free() when it is no
    ///   longer needed.
    #[doc(alias = "gtk_icon_theme_get_icon_sizes")]
    #[doc(alias = "get_icon_sizes")]
    pub fn icon_sizes(&self, icon_name: impl IntoGStr) -> Slice<i32> {
        unsafe {
            let sizes_ptr = icon_name.run_with_gstr(|icon_name| {
                ffi::gtk_icon_theme_get_icon_sizes(self.to_glib_none().0, icon_name.as_ptr())
            });
            let mut len = 0;
            if !sizes_ptr.is_null() {
                while std::ptr::read(sizes_ptr.add(len)) != 0 {
                    len += 1;
                }
            }
            Slice::from_glib_full_num(sizes_ptr, len)
        }
    }
}