mirror of
https://github.com/DioxusLabs/dioxus
synced 2024-12-24 19:43:10 +00:00
1006 lines
37 KiB
Rust
1006 lines
37 KiB
Rust
mod old {
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// #![feature(type_alias_impl_trait)]
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//
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use std::future::Future;
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trait Props {}
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struct Context<T: Props> {
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_props: std::marker::PhantomData<T>,
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}
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struct VNode {}
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// type FC<T: Props> = fn(&mut Context<T>) -> VNode;
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// type FC<T: Props> = fn(&mut Context<T>) -> Box<dyn Future<Output = VNode>>;
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impl Props for () {}
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// async fn some_component(g: &mut Context<()>) -> VNode {
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// rsx! {
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// <div>
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// </div>
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// }
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// }
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// Absolve ourselves of any type data about the context itself
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trait ContextApplier {
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fn use_hook<O, H>(
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&mut self,
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initializer: impl FnOnce() -> H,
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runner: impl Fn(&mut H) -> O,
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tear_down: impl Fn(&mut H),
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) -> O;
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}
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impl<T: Props> ContextApplier for Context<T> {
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fn use_hook<O, H>(
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&mut self,
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initializer: impl FnOnce() -> H,
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runner: impl Fn(&mut H) -> O,
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tear_down: impl Fn(&mut H),
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) -> O {
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todo!()
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}
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}
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fn use_state<T>(c: &mut impl ContextApplier, g: impl Fn() -> T) -> T {
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c.use_hook(|| {}, |_| {}, |_| {});
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g()
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}
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enum SomeComponent {
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Imperative,
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Async,
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}
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// impl<F, G> From<F> for SomeComponent
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// where
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// F: Fn() -> G,
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// G: Future<Output = ()>,
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// {
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// fn from(_: F) -> Self {
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// SomeComponent::Async
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// }
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// }
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// impl From<fn() -> ()> for SomeComponent {
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// fn from(_: F) -> Self {
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// SomeComponent::Async
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// }
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// }
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// impl<F> Into<SomeComponent> for fn() -> F
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// where
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// F: Future<Output = ()>,
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// {
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// fn into(self) -> SomeComponent {
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// todo!()
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// }
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// }
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// #[test]
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// fn test() {
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// let b: SomeComponent = test_comp.into();
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// }
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// Does this make sense?
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// Any component labeled with async can halt its rendering, but won't be able to process updates?
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// Or, those updates can still happen virtually, just not propogated into the view?
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// async fn test_comp() -> () {
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// timer::new(300).await;
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// html! {
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// <div>
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// "hello world!"
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// </div>
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// }
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// }
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// fn use_state<T: Props>(c: &mut Context<T>) {}
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// async fn another_component(ctx: &mut Context<()>) -> VNode {
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// // delay the re-render until component when the future is ready
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// // "use_future" loads the promise and provides a value (aka a loadable)
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// let value = use_effect(move || async {
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// get_value().join(timer::new(300));
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// set_value(blah);
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// });
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// rsx! {
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// <Suspense fallback={<div>"Loading..."</div>}>
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// <div>
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// "hello {name}!"
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// </div>
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// <Suspense />
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// }
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// }
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/*
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Rationale
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Today, you can do use_async and do some async operations,
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*/
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// type FC<P: Props> = fn(&mut Context<P>) -> VNode;
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// static Example: FC<()> = |_| async {
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// // some async work
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// };
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// type FC2 = fn() -> impl Future<Output = ()>;
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// struct fc<P: Props>(fn(&mut Context<P>) -> G);
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// fn blah<P: Props, G: Future<Output = VNode>>(a: fn(&mut Context<P>) -> G) {}
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// static Example2: FC2<()> = fc(|_| async { VNode {} });
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// static Example2: () = blah(|_: &mut Context<()>| async { VNode {} });
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// static Example: FC<()> = |_| {
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// let g = async { VNode {} };
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// Box::new(g)
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// };
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// static Example2: = || {};
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// type FA<R: Future<Output = i32>> = fn(i32) -> R;
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// async fn my_component()
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// static MyThing: FA<dyn Future<Output = i32>> = |_| async { 10 };
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// type SomeFn = fn() -> ();
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// static MyFn: SomeFn = || {};
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}
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mod old2 {
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mod vdom {
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//! Virtual DOM implementation
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use super::*;
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pub struct VDom {
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patches: Vec<Patch>,
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}
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impl VDom {
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// fn new(root: ComponentFn) -> Self {
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// let scope = Scope::new();
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// Self {}
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// }
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}
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}
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mod nodes {}
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mod patch {}
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mod scope {
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//! Wrappers around components
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pub struct Scope {}
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impl Scope {
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fn new() -> Self {
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Self {}
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}
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}
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}
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mod context {}
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struct EventListener {}
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struct VNode {
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/// key-value pairs of attributes
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attributes: Vec<(&'static str, &'static str)>,
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/// onclick/onhover/on etc listeners
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/// goal is to standardize around a set of cross-platform listeners?
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listeners: Vec<EventListener>,
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/// Direct children, non arena-allocated
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children: Vec<VNode>,
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}
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enum ElementType {
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div,
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p,
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a,
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img,
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}
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struct ComponentContext {}
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type ComponentFn = fn(ctx: &ComponentContext) -> VNode;
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enum Patch {}
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mod tests {
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use super::*;
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/// Ensure components can be made from the raw components
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#[test]
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fn simple_test() {
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fn component(ctx: &ComponentContext) -> VNode {
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println!("Running component");
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VNode {}
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}
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let dom = VDom::new(component);
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}
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/// Ensure components can be made from the raw components
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#[test]
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fn simple_test_closure() {
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let component: ComponentFn = |ctx| {
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println!("Running component");
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VNode {}
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};
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let dom = VDom::new(component);
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}
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}
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}
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mod text {
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//! Old methods that clouded the element implementation
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//! These all add a dedicated text renderer implementation
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mod vnode {
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impl From<&str> for VNode {
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fn from(other: &str) -> Self {
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VNode::text(other)
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}
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}
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impl From<String> for VNode {
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fn from(other: String) -> Self {
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VNode::text(other.as_str())
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}
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}
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// -----------------------------------------------
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// Allow VNodes to be iterated for map-based UI
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// -----------------------------------------------
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impl IntoIterator for VNode {
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type Item = VNode;
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// TODO: Is this possible with an array [VNode] instead of a vec?
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type IntoIter = ::std::vec::IntoIter<VNode>;
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fn into_iter(self) -> Self::IntoIter {
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vec![self].into_iter()
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}
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}
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impl Into<::std::vec::IntoIter<VNode>> for VNode {
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fn into(self) -> ::std::vec::IntoIter<VNode> {
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self.into_iter()
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}
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}
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// -----------------------------------------------
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// Allow debug/display adherent to the HTML spec
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// -----------------------------------------------
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use std::fmt;
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impl fmt::Debug for VNode {
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fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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match self {
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VNode::Element(e) => write!(f, "Node::{:?}", e),
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VNode::Text(t) => write!(f, "Node::{:?}", t),
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VNode::Component(c) => write!(f, "Node::{:?}", c),
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}
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}
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}
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// Turn a VNode into an HTML string (delegate impl to variants)
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impl fmt::Display for VNode {
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fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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match self {
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VNode::Element(element) => write!(f, "{}", element),
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VNode::Text(text) => write!(f, "{}", text),
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VNode::Component(c) => write!(f, "{}", c),
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}
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}
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}
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}
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mod velement {
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// -----------------------------------------------
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// Allow debug/display adherent to the HTML spec
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// -----------------------------------------------
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use std::fmt;
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impl fmt::Debug for VElement {
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fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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write!(
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f,
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"Element(<{}>, attrs: {:?}, children: {:?})",
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self.tag, self.attrs, self.children,
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)
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}
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}
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impl fmt::Display for VElement {
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// Turn a VElement and all of it's children (recursively) into an HTML string
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fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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write!(f, "<{}", self.tag).unwrap();
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for (attr, value) in self.attrs.iter() {
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write!(f, r#" {}="{}""#, attr, value)?;
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}
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write!(f, ">")?;
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for child in self.children.iter() {
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write!(f, "{}", child.to_string())?;
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}
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if !crate::validation::is_self_closing(&self.tag) {
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write!(f, "</{}>", self.tag)?;
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}
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Ok(())
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}
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}
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}
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mod vtext {
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// -----------------------------------------------
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// Convert from primitives directly into VText
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// -----------------------------------------------
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impl From<&str> for VText {
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fn from(text: &str) -> Self {
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VText {
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text: text.to_string(),
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}
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}
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}
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impl From<String> for VText {
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fn from(text: String) -> Self {
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VText { text }
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}
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}
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// -----------------------------------------------
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// Allow debug/display adherent to the HTML spec
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// -----------------------------------------------
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use std::fmt;
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impl fmt::Debug for VText {
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fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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write!(f, "Text({})", self.text)
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}
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}
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// Turn a VText into an HTML string
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impl fmt::Display for VText {
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fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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write!(f, "{}", self.text)
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}
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}
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}
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mod iterables {
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// TODO @Jon
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// Set this up so instead of the view trait, we can just take functions
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// Functions with no context should just be rendered
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// But functions with a context should be treated as regular components
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// impl<V: View> From<Vec<V>> for IterableNodes {
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// fn from(other: Vec<V>) -> Self {
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// IterableNodes(other.into_iter().map(|it| it.render()).collect())
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// }
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// }
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// impl<V: View> From<&Vec<V>> for IterableNodes {
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// fn from(other: &Vec<V>) -> Self {
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// IterableNodes(other.iter().map(|it| it.render()).collect())
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// }
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// }
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// impl<V: View> From<&[V]> for IterableNodes {
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// fn from(other: &[V]) -> Self {
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// IterableNodes(other.iter().map(|it| it.render()).collect())
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// }
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// }
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impl From<&str> for IterableNodes {
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fn from(other: &str) -> Self {
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IterableNodes(vec![VNode::text(other)])
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}
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}
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impl From<String> for IterableNodes {
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fn from(other: String) -> Self {
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IterableNodes(vec![VNode::text(other.as_str())])
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}
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}
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}
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mod tests {
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#[cfg(test)]
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mod tests {
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use super::*;
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#[test]
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fn self_closing_tag_to_string() {
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let node = VNode::element("br");
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// No </br> since self closing tag
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assert_eq!(&node.to_string(), "<br>");
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}
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#[test]
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fn to_string() {
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let mut node = VNode::Element(VElement::new("div"));
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node.as_velement_mut()
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.unwrap()
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.attrs
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.insert("id".into(), "some-id".into());
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let mut child = VNode::Element(VElement::new("span"));
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let mut text = VNode::Text(VText::new("Hello world"));
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child.as_velement_mut().unwrap().children.push(text);
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node.as_velement_mut().unwrap().children.push(child);
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let expected = r#"<div id="some-id"><span>Hello world</span></div>"#;
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assert_eq!(node.to_string(), expected);
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}
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}
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}
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mod ddiff {
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/// The diffing algorithm to compare two VNode trees and generate a list of patches to update the VDom.
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/// Currently, using an index-based patching algorithm
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///
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pub mod diff {
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use super::*;
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use crate::nodes::{VNode, VText};
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use std::cmp::min;
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use std::collections::HashMap;
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use std::mem;
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// pub use apply_patches::patch;
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/// A Patch encodes an operation that modifies a real DOM element.
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///
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/// To update the real DOM that a user sees you'll want to first diff your
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/// old virtual dom and new virtual dom.
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///
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/// This diff operation will generate `Vec<Patch>` with zero or more patches that, when
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/// applied to your real DOM, will make your real DOM look like your new virtual dom.
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///
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/// Each Patch has a u32 node index that helps us identify the real DOM node that it applies to.
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///
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/// Our old virtual dom's nodes are indexed depth first, as shown in this illustration
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/// (0 being the root node, 1 being it's first child, 2 being it's first child's first child).
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///
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/// ```text
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/// .─.
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/// ( 0 )
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/// `┬'
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/// ┌────┴──────┐
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/// │ │
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/// ▼ ▼
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/// .─. .─.
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/// ( 1 ) ( 4 )
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/// `┬' `─'
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/// ┌────┴───┐ │
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/// │ │ ├─────┬─────┐
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/// ▼ ▼ │ │ │
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/// .─. .─. ▼ ▼ ▼
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/// ( 2 ) ( 3 ) .─. .─. .─.
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/// `─' `─' ( 5 ) ( 6 ) ( 7 )
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/// `─' `─' `─'
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/// ```
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///
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/// The patching process is tested in a real browser in crates/virtual-dom-rs/tests/diff_patch.rs
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#[derive(PartialEq)]
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pub enum Patch<'a> {
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/// Append a vector of child nodes to a parent node id.
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AppendChildren(NodeIdx, Vec<&'a VNode>),
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/// For a `node_i32`, remove all children besides the first `len`
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TruncateChildren(NodeIdx, usize),
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/// Replace a node with another node. This typically happens when a node's tag changes.
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/// ex: <div> becomes <span>
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Replace(NodeIdx, &'a VNode),
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/// Add attributes that the new node has that the old node does not
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AddAttributes(NodeIdx, HashMap<&'a str, &'a str>),
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/// Remove attributes that the old node had that the new node doesn't
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RemoveAttributes(NodeIdx, Vec<&'a str>),
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/// Change the text of a Text node.
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ChangeText(NodeIdx, &'a VText),
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}
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type NodeIdx = usize;
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impl<'a> Patch<'a> {
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/// Every Patch is meant to be applied to a specific node within the DOM. Get the
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/// index of the DOM node that this patch should apply to. DOM nodes are indexed
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/// depth first with the root node in the tree having index 0.
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pub fn node_idx(&self) -> usize {
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match self {
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Patch::AppendChildren(node_idx, _) => *node_idx,
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Patch::TruncateChildren(node_idx, _) => *node_idx,
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Patch::Replace(node_idx, _) => *node_idx,
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Patch::AddAttributes(node_idx, _) => *node_idx,
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Patch::RemoveAttributes(node_idx, _) => *node_idx,
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Patch::ChangeText(node_idx, _) => *node_idx,
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}
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}
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}
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/// Given two VNode's generate Patch's that would turn the old virtual node's
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/// real DOM node equivalent into the new VNode's real DOM node equivalent.
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pub fn diff_vnodes<'a>(old: &'a VNode, new: &'a VNode) -> Vec<Patch<'a>> {
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diff_recursive(&old, &new, &mut 0)
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}
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fn diff_recursive<'a, 'b>(
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old: &'a VNode,
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new: &'a VNode,
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cur_node_idx: &'b mut usize,
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) -> Vec<Patch<'a>> {
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let mut patches = vec![];
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let mut replace = false;
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// Different enum variants, replace!
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// VNodes are of different types, and therefore will cause a re-render.
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// TODO: Handle previously-mounted children so they don't get re-mounted
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if mem::discriminant(old) != mem::discriminant(new) {
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replace = true;
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}
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if let (VNode::Element(old_element), VNode::Element(new_element)) = (old, new) {
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// Replace if there are different element tags
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if old_element.tag != new_element.tag {
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replace = true;
|
|
}
|
|
|
|
// Replace if two elements have different keys
|
|
// TODO: More robust key support. This is just an early stopgap to allow you to force replace
|
|
// an element... say if it's event changed. Just change the key name for now.
|
|
// In the future we want keys to be used to create a Patch::ReOrder to re-order siblings
|
|
if old_element.attrs.get("key").is_some()
|
|
&& old_element.attrs.get("key") != new_element.attrs.get("key")
|
|
{
|
|
replace = true;
|
|
}
|
|
}
|
|
|
|
// Handle replacing of a node
|
|
if replace {
|
|
patches.push(Patch::Replace(*cur_node_idx, &new));
|
|
if let VNode::Element(old_element_node) = old {
|
|
for child in old_element_node.children.iter() {
|
|
increment_node_idx_for_children(child, cur_node_idx);
|
|
}
|
|
}
|
|
return patches;
|
|
}
|
|
|
|
// The following comparison can only contain identical variants, other
|
|
// cases have already been handled above by comparing variant
|
|
// discriminants.
|
|
match (old, new) {
|
|
// We're comparing two text nodes
|
|
(VNode::Text(old_text), VNode::Text(new_text)) => {
|
|
if old_text != new_text {
|
|
patches.push(Patch::ChangeText(*cur_node_idx, &new_text));
|
|
}
|
|
}
|
|
|
|
// We're comparing two element nodes
|
|
(VNode::Element(old_element), VNode::Element(new_element)) => {
|
|
let mut add_attributes: HashMap<&str, &str> = HashMap::new();
|
|
let mut remove_attributes: Vec<&str> = vec![];
|
|
|
|
// TODO: -> split out into func
|
|
for (new_attr_name, new_attr_val) in new_element.attrs.iter() {
|
|
match old_element.attrs.get(new_attr_name) {
|
|
Some(ref old_attr_val) => {
|
|
if old_attr_val != &new_attr_val {
|
|
add_attributes.insert(new_attr_name, new_attr_val);
|
|
}
|
|
}
|
|
None => {
|
|
add_attributes.insert(new_attr_name, new_attr_val);
|
|
}
|
|
};
|
|
}
|
|
|
|
// TODO: -> split out into func
|
|
for (old_attr_name, old_attr_val) in old_element.attrs.iter() {
|
|
if add_attributes.get(&old_attr_name[..]).is_some() {
|
|
continue;
|
|
};
|
|
|
|
match new_element.attrs.get(old_attr_name) {
|
|
Some(ref new_attr_val) => {
|
|
if new_attr_val != &old_attr_val {
|
|
remove_attributes.push(old_attr_name);
|
|
}
|
|
}
|
|
None => {
|
|
remove_attributes.push(old_attr_name);
|
|
}
|
|
};
|
|
}
|
|
|
|
if add_attributes.len() > 0 {
|
|
patches.push(Patch::AddAttributes(*cur_node_idx, add_attributes));
|
|
}
|
|
if remove_attributes.len() > 0 {
|
|
patches.push(Patch::RemoveAttributes(*cur_node_idx, remove_attributes));
|
|
}
|
|
|
|
let old_child_count = old_element.children.len();
|
|
let new_child_count = new_element.children.len();
|
|
|
|
if new_child_count > old_child_count {
|
|
let append_patch: Vec<&'a VNode> =
|
|
new_element.children[old_child_count..].iter().collect();
|
|
patches.push(Patch::AppendChildren(*cur_node_idx, append_patch))
|
|
}
|
|
|
|
if new_child_count < old_child_count {
|
|
patches.push(Patch::TruncateChildren(*cur_node_idx, new_child_count))
|
|
}
|
|
|
|
let min_count = min(old_child_count, new_child_count);
|
|
for index in 0..min_count {
|
|
*cur_node_idx = *cur_node_idx + 1;
|
|
let old_child = &old_element.children[index];
|
|
let new_child = &new_element.children[index];
|
|
patches.append(&mut diff_recursive(
|
|
&old_child,
|
|
&new_child,
|
|
cur_node_idx,
|
|
))
|
|
}
|
|
if new_child_count < old_child_count {
|
|
for child in old_element.children[min_count..].iter() {
|
|
increment_node_idx_for_children(child, cur_node_idx);
|
|
}
|
|
}
|
|
}
|
|
(VNode::Text(_), VNode::Element(_)) | (VNode::Element(_), VNode::Text(_)) => {
|
|
unreachable!(
|
|
"Unequal variant discriminants should already have been handled"
|
|
);
|
|
}
|
|
_ => todo!("Diffing Not yet implemented for all node types"),
|
|
};
|
|
|
|
// new_root.create_element()
|
|
patches
|
|
}
|
|
|
|
fn increment_node_idx_for_children<'a, 'b>(
|
|
old: &'a VNode,
|
|
cur_node_idx: &'b mut usize,
|
|
) {
|
|
*cur_node_idx += 1;
|
|
if let VNode::Element(element_node) = old {
|
|
for child in element_node.children.iter() {
|
|
increment_node_idx_for_children(&child, cur_node_idx);
|
|
}
|
|
}
|
|
}
|
|
|
|
// #[cfg(test)]
|
|
// mod tests {
|
|
// use super::*;
|
|
// use crate::prelude::*;
|
|
// type VirtualNode = VNode;
|
|
|
|
// /// Test that we generate the right Vec<Patch> for some start and end virtual dom.
|
|
// pub struct DiffTestCase<'a> {
|
|
// // ex: "Patching root level nodes works"
|
|
// pub description: &'static str,
|
|
// // ex: html! { <div> </div> }
|
|
// pub old: VNode,
|
|
// // ex: html! { <strong> </strong> }
|
|
// pub new: VNode,
|
|
// // ex: vec![Patch::Replace(0, &html! { <strong></strong> })],
|
|
// pub expected: Vec<Patch<'a>>,
|
|
// }
|
|
|
|
// impl<'a> DiffTestCase<'a> {
|
|
// pub fn test(&self) {
|
|
// // ex: vec![Patch::Replace(0, &html! { <strong></strong> })],
|
|
// let patches = diff_vnodes(&self.old, &self.new);
|
|
|
|
// assert_eq!(patches, self.expected, "{}", self.description);
|
|
// }
|
|
// }
|
|
// use super::*;
|
|
// use crate::nodes::{VNode, VText};
|
|
// use std::collections::HashMap;
|
|
|
|
// #[test]
|
|
// fn replace_node() {
|
|
// DiffTestCase {
|
|
// description: "Replace the root if the tag changed",
|
|
// old: html! { <div> </div> },
|
|
// new: html! { <span> </span> },
|
|
// expected: vec![Patch::Replace(0, &html! { <span></span> })],
|
|
// }
|
|
// .test();
|
|
// DiffTestCase {
|
|
// description: "Replace a child node",
|
|
// old: html! { <div> <b></b> </div> },
|
|
// new: html! { <div> <strong></strong> </div> },
|
|
// expected: vec![Patch::Replace(1, &html! { <strong></strong> })],
|
|
// }
|
|
// .test();
|
|
// DiffTestCase {
|
|
// description: "Replace node with a child",
|
|
// old: html! { <div> <b>1</b> <b></b> </div> },
|
|
// new: html! { <div> <i>1</i> <i></i> </div>},
|
|
// expected: vec![
|
|
// Patch::Replace(1, &html! { <i>1</i> }),
|
|
// Patch::Replace(3, &html! { <i></i> }),
|
|
// ], //required to check correct index
|
|
// }
|
|
// .test();
|
|
// }
|
|
|
|
// #[test]
|
|
// fn add_children() {
|
|
// DiffTestCase {
|
|
// description: "Added a new node to the root node",
|
|
// old: html! { <div> <b></b> </div> },
|
|
// new: html! { <div> <b></b> <span></span> </div> },
|
|
// expected: vec![Patch::AppendChildren(0, vec![&html! { <span></span> }])],
|
|
// }
|
|
// .test();
|
|
// }
|
|
|
|
// #[test]
|
|
// fn remove_nodes() {
|
|
// DiffTestCase {
|
|
// description: "Remove all child nodes at and after child sibling index 1",
|
|
// old: html! { <div> <b></b> <span></span> </div> },
|
|
// new: html! { <div> </div> },
|
|
// expected: vec![Patch::TruncateChildren(0, 0)],
|
|
// }
|
|
// .test();
|
|
// DiffTestCase {
|
|
// description: "Remove a child and a grandchild node",
|
|
// old: html! {
|
|
// <div>
|
|
// <span>
|
|
// <b></b>
|
|
// // This `i` tag will get removed
|
|
// <i></i>
|
|
// </span>
|
|
// // This `strong` tag will get removed
|
|
// <strong></strong>
|
|
// </div> },
|
|
// new: html! {
|
|
// <div>
|
|
// <span>
|
|
// <b></b>
|
|
// </span>
|
|
// </div> },
|
|
// expected: vec![Patch::TruncateChildren(0, 1), Patch::TruncateChildren(1, 1)],
|
|
// }
|
|
// .test();
|
|
// DiffTestCase {
|
|
// description: "Removing child and change next node after parent",
|
|
// old: html! { <div> <b> <i></i> <i></i> </b> <b></b> </div> },
|
|
// new: html! { <div> <b> <i></i> </b> <i></i> </div>},
|
|
// expected: vec![
|
|
// Patch::TruncateChildren(1, 1),
|
|
// Patch::Replace(4, &html! { <i></i> }),
|
|
// ], //required to check correct index
|
|
// }
|
|
// .test();
|
|
// }
|
|
|
|
// #[test]
|
|
// fn add_attributes() {
|
|
// let mut attributes = HashMap::new();
|
|
// attributes.insert("id", "hello");
|
|
|
|
// DiffTestCase {
|
|
// old: html! { <div> </div> },
|
|
// new: html! { <div id="hello"> </div> },
|
|
// expected: vec![Patch::AddAttributes(0, attributes.clone())],
|
|
// description: "Add attributes",
|
|
// }
|
|
// .test();
|
|
|
|
// DiffTestCase {
|
|
// old: html! { <div id="foobar"> </div> },
|
|
// new: html! { <div id="hello"> </div> },
|
|
// expected: vec![Patch::AddAttributes(0, attributes)],
|
|
// description: "Change attribute",
|
|
// }
|
|
// .test();
|
|
// }
|
|
|
|
// #[test]
|
|
// fn remove_attributes() {
|
|
// DiffTestCase {
|
|
// old: html! { <div id="hey-there"></div> },
|
|
// new: html! { <div> </div> },
|
|
// expected: vec![Patch::RemoveAttributes(0, vec!["id"])],
|
|
// description: "Add attributes",
|
|
// }
|
|
// .test();
|
|
// }
|
|
|
|
// #[test]
|
|
// fn change_attribute() {
|
|
// let mut attributes = HashMap::new();
|
|
// attributes.insert("id", "changed");
|
|
|
|
// DiffTestCase {
|
|
// description: "Add attributes",
|
|
// old: html! { <div id="hey-there"></div> },
|
|
// new: html! { <div id="changed"> </div> },
|
|
// expected: vec![Patch::AddAttributes(0, attributes)],
|
|
// }
|
|
// .test();
|
|
// }
|
|
|
|
// #[test]
|
|
// fn replace_text_node() {
|
|
// DiffTestCase {
|
|
// description: "Replace text node",
|
|
// old: html! { Old },
|
|
// new: html! { New },
|
|
// expected: vec![Patch::ChangeText(0, &VText::new("New"))],
|
|
// }
|
|
// .test();
|
|
// }
|
|
|
|
// // Initially motivated by having two elements where all that changed was an event listener
|
|
// // because right now we don't patch event listeners. So.. until we have a solution
|
|
// // for that we can just give them different keys to force a replace.
|
|
// #[test]
|
|
// fn replace_if_different_keys() {
|
|
// DiffTestCase {
|
|
// description: "If two nodes have different keys always generate a full replace.",
|
|
// old: html! { <div key="1"> </div> },
|
|
// new: html! { <div key="2"> </div> },
|
|
// expected: vec![Patch::Replace(0, &html! {<div key="2"> </div>})],
|
|
// }
|
|
// .test()
|
|
// }
|
|
|
|
// // // TODO: Key support
|
|
// // #[test]
|
|
// // fn reorder_chldren() {
|
|
// // let mut attributes = HashMap::new();
|
|
// // attributes.insert("class", "foo");
|
|
// //
|
|
// // let old_children = vec![
|
|
// // // old node 0
|
|
// // html! { <div key="hello", id="same-id", style="",></div> },
|
|
// // // removed
|
|
// // html! { <div key="gets-removed",> { "This node gets removed"} </div>},
|
|
// // // old node 2
|
|
// // html! { <div key="world", class="changed-class",></div>},
|
|
// // // removed
|
|
// // html! { <div key="this-got-removed",> { "This node gets removed"} </div>},
|
|
// // ];
|
|
// //
|
|
// // let new_children = vec![
|
|
// // html! { <div key="world", class="foo",></div> },
|
|
// // html! { <div key="new",> </div>},
|
|
// // html! { <div key="hello", id="same-id",></div>},
|
|
// // ];
|
|
// //
|
|
// // test(DiffTestCase {
|
|
// // old: html! { <div> { old_children } </div> },
|
|
// // new: html! { <div> { new_children } </div> },
|
|
// // expected: vec![
|
|
// // // TODO: Come up with the patch structure for keyed nodes..
|
|
// // // keying should only work if all children have keys..
|
|
// // ],
|
|
// // description: "Add attributes",
|
|
// // })
|
|
// // }
|
|
// }
|
|
}
|
|
}
|
|
|
|
mod vcomponent {
|
|
// -----------------------------------------------
|
|
// Allow debug/display adherent to the HTML spec
|
|
// -----------------------------------------------
|
|
|
|
impl fmt::Debug for VComponent {
|
|
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
|
|
// TODO: @JON Implement how components should be formatted when spit out to html
|
|
// It probably can't be as straightforward as renderinng their VNodes
|
|
// It _could_ be, but we can't really implement that directly
|
|
// Instead, we should drop a vnode labeled with the component id/key
|
|
|
|
// write!(
|
|
// f,
|
|
// "Element(<{}>, attrs: {:?}, children: {:?})",
|
|
// self.tag, self.attrs, self.children,
|
|
// )
|
|
Ok(())
|
|
}
|
|
}
|
|
|
|
impl fmt::Display for VComponent {
|
|
// Turn a VElement and all of it's children (recursively) into an HTML string
|
|
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
|
|
// write!(f, "<{}", self.tag).unwrap();
|
|
|
|
// for (attr, value) in self.attrs.iter() {
|
|
// write!(f, r#" {}="{}""#, attr, value)?;
|
|
// }
|
|
|
|
// write!(f, ">")?;
|
|
|
|
// for child in self.children.iter() {
|
|
// write!(f, "{}", child.to_string())?;
|
|
// }
|
|
|
|
// if !crate::validation::is_self_closing(&self.tag) {
|
|
// write!(f, "</{}>", self.tag)?;
|
|
// }
|
|
|
|
Ok(())
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// pub mod iterables {
|
|
// use super::*;
|
|
|
|
// /// Used by the html! macro for all braced child nodes so that we can use any type
|
|
// /// that implements Into<IterableNodes>
|
|
// ///
|
|
// /// html! { <div> { nodes } </div> }
|
|
// ///
|
|
// /// nodes can be a String .. VNode .. Vec<VNode> ... etc
|
|
// pub struct IterableNodes(Vec<VNode>);
|
|
|
|
// impl IterableNodes {
|
|
// /// Retrieve the first node mutably
|
|
// pub fn first(&mut self) -> &mut VNode {
|
|
// self.0.first_mut().unwrap()
|
|
// }
|
|
|
|
// /// Retrieve the last node mutably
|
|
// pub fn last(&mut self) -> &mut VNode {
|
|
// self.0.last_mut().unwrap()
|
|
// }
|
|
// }
|
|
|
|
// impl IntoIterator for IterableNodes {
|
|
// type Item = VNode;
|
|
// // TODO: Is this possible with an array [VNode] instead of a vec?
|
|
// type IntoIter = ::std::vec::IntoIter<VNode>;
|
|
|
|
// fn into_iter(self) -> Self::IntoIter {
|
|
// self.0.into_iter()
|
|
// }
|
|
// }
|
|
|
|
// impl From<VNode> for IterableNodes {
|
|
// fn from(other: VNode) -> Self {
|
|
// IterableNodes(vec![other])
|
|
// }
|
|
// }
|
|
|
|
// impl From<Vec<VNode>> for IterableNodes {
|
|
// fn from(other: Vec<VNode>) -> Self {
|
|
// IterableNodes(other)
|
|
// }
|
|
// }
|
|
// }
|