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

use crate::RenderNodeType;
use glib::translate::*;

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

    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!(
    CairoNode,
    ffi::GskCairoNode,
    ffi::gsk_cairo_node_get_type,
    RenderNodeType::CairoNode
);

impl CairoNode {
    /// Creates a [`RenderNode`][crate::RenderNode] that will render a cairo surface
    /// into the area given by `bounds`.
    ///
    /// You can draw to the cairo surface using [``draw_context()``][`Self::draw_context()`].
    /// ## `bounds`
    /// the rectangle to render to
    ///
    /// # Returns
    ///
    /// A new [`RenderNode`][crate::RenderNode]
    #[doc(alias = "gsk_cairo_node_new")]
    pub fn new(bounds: &graphene::Rect) -> Self {
        assert_initialized_main_thread!();
        unsafe { from_glib_full(ffi::gsk_cairo_node_new(bounds.to_glib_none().0)) }
    }

    /// Creates a Cairo context for drawing using the surface associated
    /// to the render node.
    ///
    /// If no surface exists yet, a surface will be created optimized for
    /// rendering to `renderer`.
    ///
    /// # Returns
    ///
    /// a Cairo context used for drawing; use
    ///  `cairo_destroy()` when done drawing
    #[doc(alias = "gsk_cairo_node_get_draw_context")]
    #[doc(alias = "get_draw_context")]
    pub fn draw_context(&self) -> Option<cairo::Context> {
        unsafe { from_glib_full(ffi::gsk_cairo_node_get_draw_context(self.to_glib_none().0)) }
    }

    /// Retrieves the Cairo surface used by the render node.
    ///
    /// # Returns
    ///
    /// a Cairo surface
    #[doc(alias = "gsk_cairo_node_get_surface")]
    #[doc(alias = "get_surface")]
    pub fn surface(&self) -> Option<cairo::Surface> {
        unsafe { from_glib_none(ffi::gsk_cairo_node_get_surface(self.to_glib_none().0)) }
    }
}