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

use crate::{ColorStop, RenderNodeType};
use glib::translate::*;
use graphene::{Point, Rect};

glib::wrapper! {
    /// A render node for a repeating linear gradient.
    #[derive(Debug, PartialEq, Eq, PartialOrd, Ord, Hash)]
    #[doc(alias = "GskRepeatingLinearGradientNode")]
    pub struct RepeatingLinearGradientNode(Shared<ffi::GskRepeatingLinearGradientNode>);

    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!(
    RepeatingLinearGradientNode,
    ffi::GskRepeatingLinearGradientNode,
    ffi::gsk_repeating_linear_gradient_node_get_type,
    RenderNodeType::RepeatingLinearGradientNode
);

impl RepeatingLinearGradientNode {
    /// Creates a [`RenderNode`][crate::RenderNode] that will create a repeating linear gradient
    /// from the given points and color stops, and render that into the area
    /// given by `bounds`.
    /// ## `bounds`
    /// the rectangle to render the linear gradient into
    /// ## `start`
    /// the point at which the linear gradient will begin
    /// ## `end`
    /// the point at which the linear gradient will finish
    /// ## `color_stops`
    /// a pointer to an array of
    /// [`ColorStop`][crate::ColorStop] defining the gradient. The offsets of all color stops
    ///  must be increasing. The first stop's offset must be >= 0 and the last
    ///  stop's offset must be <= 1.
    ///
    /// # Returns
    ///
    /// A new [`RenderNode`][crate::RenderNode]
    #[doc(alias = "gsk_repeating_linear_gradient_node_new")]
    pub fn new(bounds: &Rect, start: &Point, end: &Point, color_stops: &[ColorStop]) -> Self {
        assert_initialized_main_thread!();
        let n_color_stops = color_stops.len() as usize;
        unsafe {
            from_glib_full(ffi::gsk_repeating_linear_gradient_node_new(
                bounds.to_glib_none().0,
                start.to_glib_none().0,
                end.to_glib_none().0,
                color_stops.to_glib_none().0,
                n_color_stops,
            ))
        }
    }
}