90 lines
2.2 KiB
Rust
90 lines
2.2 KiB
Rust
use std::marker::PhantomData;
|
|
|
|
use pathfinder_geometry::{rect::RectF, vector::Vector2F};
|
|
|
|
use crate::{
|
|
AnyElement, Element, LayoutContext, PaintContext, SceneBuilder, SizeConstraint, View,
|
|
ViewContext,
|
|
};
|
|
|
|
pub trait Component<V: View> {
|
|
fn render(self, v: &mut V, cx: &mut ViewContext<V>) -> AnyElement<V>;
|
|
|
|
fn into_element(self) -> ComponentAdapter<V, Self>
|
|
where
|
|
Self: Sized,
|
|
{
|
|
ComponentAdapter::new(self)
|
|
}
|
|
}
|
|
|
|
pub struct ComponentAdapter<V, E> {
|
|
component: Option<E>,
|
|
phantom: PhantomData<V>,
|
|
}
|
|
|
|
impl<E, V> ComponentAdapter<V, E> {
|
|
pub fn new(e: E) -> Self {
|
|
Self {
|
|
component: Some(e),
|
|
phantom: PhantomData,
|
|
}
|
|
}
|
|
}
|
|
|
|
impl<V: View, C: Component<V> + 'static> Element<V> for ComponentAdapter<V, C> {
|
|
type LayoutState = AnyElement<V>;
|
|
|
|
type PaintState = ();
|
|
|
|
fn layout(
|
|
&mut self,
|
|
constraint: SizeConstraint,
|
|
view: &mut V,
|
|
cx: &mut LayoutContext<V>,
|
|
) -> (Vector2F, Self::LayoutState) {
|
|
let component = self.component.take().unwrap();
|
|
let mut element = component.render(view, cx.view_context());
|
|
let constraint = element.layout(constraint, view, cx);
|
|
(constraint, element)
|
|
}
|
|
|
|
fn paint(
|
|
&mut self,
|
|
scene: &mut SceneBuilder,
|
|
bounds: RectF,
|
|
visible_bounds: RectF,
|
|
layout: &mut Self::LayoutState,
|
|
view: &mut V,
|
|
cx: &mut PaintContext<V>,
|
|
) -> Self::PaintState {
|
|
layout.paint(scene, bounds.origin(), visible_bounds, view, cx)
|
|
}
|
|
|
|
fn rect_for_text_range(
|
|
&self,
|
|
range_utf16: std::ops::Range<usize>,
|
|
_: RectF,
|
|
_: RectF,
|
|
element: &Self::LayoutState,
|
|
_: &Self::PaintState,
|
|
view: &V,
|
|
cx: &ViewContext<V>,
|
|
) -> Option<RectF> {
|
|
element.rect_for_text_range(range_utf16, view, cx)
|
|
}
|
|
|
|
fn debug(
|
|
&self,
|
|
_: RectF,
|
|
element: &Self::LayoutState,
|
|
_: &Self::PaintState,
|
|
view: &V,
|
|
cx: &ViewContext<V>,
|
|
) -> serde_json::Value {
|
|
serde_json::json!({
|
|
"type": "ComponentAdapter",
|
|
"child": element.debug(view, cx),
|
|
})
|
|
}
|
|
}
|