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

use crate::{RenderNode, RenderNodeType, Transform};
use glib::translate::*;

glib::wrapper! {
    /// A render node applying a [`Transform`][crate::Transform] to its single child node.
    #[derive(Debug, PartialEq, Eq, PartialOrd, Ord, Hash)]
    #[doc(alias = "GskTransformNode")]
    pub struct TransformNode(Shared<ffi::GskTransformNode>);

    match fn {
        ref => |ptr| ffi::gsk_render_node_ref(ptr as *mut ffi::GskRenderNode),
        unref => |ptr| ffi::gsk_render_node_unref(ptr as *mut ffi::GskRenderNode),
    }
}

define_render_node!(
    TransformNode,
    ffi::GskTransformNode,
    ffi::gsk_transform_node_get_type,
    RenderNodeType::TransformNode
);

impl TransformNode {
    /// Creates a [`RenderNode`][crate::RenderNode] that will transform the given `child`
    /// with the given `transform`.
    /// ## `child`
    /// The node to transform
    /// ## `transform`
    /// The transform to apply
    ///
    /// # Returns
    ///
    /// A new [`RenderNode`][crate::RenderNode]
    #[doc(alias = "gsk_transform_node_new")]
    pub fn new<P: AsRef<RenderNode>>(child: &P, transform: &Transform) -> Self {
        skip_assert_initialized!();
        unsafe {
            from_glib_full(ffi::gsk_transform_node_new(
                child.as_ref().to_glib_none().0,
                transform.to_glib_none().0,
            ))
        }
    }

    /// Gets the child node that is getting transformed by the given `self`.
    ///
    /// # Returns
    ///
    /// The child that is getting transformed
    #[doc(alias = "gsk_transform_node_get_child")]
    #[doc(alias = "get_child")]
    pub fn child(&self) -> Option<RenderNode> {
        unsafe { from_glib_none(ffi::gsk_transform_node_get_child(self.to_glib_none().0)) }
    }

    /// Retrieves the [`Transform`][crate::Transform] used by the `self`.
    ///
    /// # Returns
    ///
    /// a [`Transform`][crate::Transform]
    #[doc(alias = "gsk_transform_node_get_transform")]
    #[doc(alias = "get_transform")]
    pub fn transform(&self) -> Option<Transform> {
        unsafe { from_glib_none(ffi::gsk_transform_node_get_transform(self.to_glib_none().0)) }
    }
}