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

use crate::AttrList;
use crate::Attribute;
use glib::translate::*;
use std::mem;

impl AttrList {
    /// Insert the given attribute into the [`AttrList`][crate::AttrList]. It will
    /// replace any attributes of the same type on that segment
    /// and be merged with any adjoining attributes that are identical.
    ///
    /// This function is slower than [`insert()`][Self::insert()] for
    /// creating an attribute list in order (potentially much slower
    /// for large lists). However, [`insert()`][Self::insert()] is not
    /// suitable for continually changing a set of attributes
    /// since it never removes or combines existing attributes.
    /// ## `attr`
    /// the attribute to insert. Ownership of this
    ///  value is assumed by the list.
    #[doc(alias = "pango_attr_list_change")]
    pub fn change(&self, attr: Attribute) {
        unsafe {
            ffi::pango_attr_list_change(self.to_glib_none().0, attr.to_glib_none().0 as *mut _);
            mem::forget(attr); //As attr transferred fully
        }
    }

    /// Checks whether `self` and `other_list` contain the same attributes and
    /// whether those attributes apply to the same ranges. Beware that this
    /// will return wrong values if any list contains duplicates.
    /// ## `other_list`
    /// the other [`AttrList`][crate::AttrList]
    ///
    /// # Returns
    ///
    /// [`true`] if the lists are equal, [`false`] if they aren't.
    #[cfg(any(feature = "v1_46", feature = "dox"))]
    #[cfg_attr(feature = "dox", doc(cfg(feature = "v1_46")))]
    #[doc(alias = "pango_attr_list_equal")]
    fn equal(&self, other_list: &AttrList) -> bool {
        unsafe {
            from_glib(ffi::pango_attr_list_equal(
                self.to_glib_none().0,
                other_list.to_glib_none().0,
            ))
        }
    }

    /// Insert the given attribute into the [`AttrList`][crate::AttrList]. It will
    /// be inserted after all other attributes with a matching
    /// `start_index`.
    /// ## `attr`
    /// the attribute to insert. Ownership of this
    ///  value is assumed by the list.
    #[doc(alias = "pango_attr_list_insert")]
    pub fn insert(&self, attr: Attribute) {
        unsafe {
            ffi::pango_attr_list_insert(self.to_glib_none().0, attr.to_glib_none().0 as *mut _);
            mem::forget(attr); //As attr transferred fully
        }
    }

    /// Insert the given attribute into the [`AttrList`][crate::AttrList]. It will
    /// be inserted before all other attributes with a matching
    /// `start_index`.
    /// ## `attr`
    /// the attribute to insert. Ownership of this
    ///  value is assumed by the list.
    #[doc(alias = "pango_attr_list_insert_before")]
    pub fn insert_before(&self, attr: Attribute) {
        unsafe {
            ffi::pango_attr_list_insert_before(
                self.to_glib_none().0,
                attr.to_glib_none().0 as *mut _,
            );
            mem::forget(attr); //As attr transferred fully
        }
    }
}

#[cfg(any(feature = "v1_46", feature = "dox"))]
impl PartialEq for AttrList {
    #[inline]
    fn eq(&self, other: &Self) -> bool {
        self.equal(other)
    }
}

#[cfg(any(feature = "v1_46", feature = "dox"))]
impl Eq for AttrList {}