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

use crate::Builder;
use glib::object::{Cast, IsA};
use glib::translate::*;
use glib::Object;
use std::path::Path;

impl Builder {
    #[doc(alias = "gtk_builder_new_from_file")]
    #[doc(alias = "new_from_file")]
    pub fn from_file(file_path: impl AsRef<Path>) -> Self {
        assert_initialized_main_thread!();
        unsafe {
            from_glib_full(ffi::gtk_builder_new_from_file(
                file_path.as_ref().to_glib_none().0,
            ))
        }
    }

    #[doc(alias = "gtk_builder_get_current_object")]
    #[doc(alias = "get_current_object")]
    pub fn current_object(&self) -> Option<glib::Object> {
        unsafe {
            let ptr = ffi::gtk_builder_get_current_object(self.to_glib_none().0);
            if ptr.is_null() {
                None
            } else {
                glib::gobject_ffi::g_object_ref(ptr as *mut glib::gobject_ffi::GObject);
                Some(from_glib_full(ptr))
            }
        }
    }

    #[doc(alias = "gtk_builder_get_object")]
    #[doc(alias = "get_object")]
    pub fn object<T: IsA<Object>>(&self, name: &str) -> Option<T> {
        unsafe {
            Option::<Object>::from_glib_none(ffi::gtk_builder_get_object(
                self.to_glib_none().0,
                name.to_glib_none().0,
            ))
            .and_then(|obj| obj.dynamic_cast::<T>().ok())
        }
    }

    #[doc(alias = "gtk_builder_add_from_file")]
    pub fn add_from_file(&self, file_path: impl AsRef<Path>) -> Result<(), glib::Error> {
        unsafe {
            let mut error = ::std::ptr::null_mut();
            ffi::gtk_builder_add_from_file(
                self.to_glib_none().0,
                file_path.as_ref().to_glib_none().0,
                &mut error,
            );
            if error.is_null() {
                Ok(())
            } else {
                Err(from_glib_full(error))
            }
        }
    }
}