use std::time::Duration; use gpui::*; struct Assets {} impl AssetSource for Assets {    fn load(&self, path: &str) -> Result<Option<std::borrow::Cow<'static, [u8]>>> {        std::fs::read(path)            .map(Into::into)            .map_err(Into::into)            .map(Some)    }     fn list(&self, path: &str) -> Result<Vec<SharedString>> {        Ok(std::fs::read_dir(path)?            .filter_map(|entry| {                Some(SharedString::from(                    entry.ok()?.path().to_string_lossy().to_string(),                ))            })            .collect::<Vec<_>>())    }} const ARROW_CIRCLE_SVG: &str = concat!(    env!("CARGO_MANIFEST_DIR"),    "/examples/image/arrow_circle.svg"); struct AnimationExample {} impl Render for AnimationExample {    fn render(&mut self, _cx: &mut ViewContext<Self>) -> impl IntoElement {        div().flex().flex_col().size_full().justify_around().child(            div().flex().flex_row().w_full().justify_around().child(                div()                    .flex()                    .bg(rgb(0x2e7d32))                    .size(Length::Definite(Pixels(300.0).into()))                    .justify_center()                    .items_center()                    .shadow_lg()                    .text_xl()                    .text_color(black())                    .child("hello")                    .child(                        svg()                            .size_8()                            .path(ARROW_CIRCLE_SVG)                            .text_color(black())                            .with_animation(                                "image_circle",                                Animation::new(Duration::from_secs(2))                                    .repeat()                                    .with_easing(bounce(ease_in_out)),                                |svg, delta| {                                    svg.with_transformation(Transformation::rotate(percentage(                                        delta,                                    )))                                },                            ),                    ),            ),        )    }} fn main() {    App::new()        .with_assets(Assets {})        .run(|cx: &mut AppContext| {            let options = WindowOptions {                window_bounds: Some(WindowBounds::Windowed(Bounds::centered(                    None,                    size(px(300.), px(300.)),                    cx,                ))),                ..Default::default()            };            cx.open_window(options, |cx| {                cx.activate(false);                cx.new_view(|_cx| AnimationExample {})            })            .unwrap();        });}