Respo in Rust

tiny toy virtual DOM based framework for Rust.

Status: experimenting, unhappy without HMR.

Respo was initially designed to work in a dynamic language with persistent data and HMR(hot code replacement), which is dramatically different from Rust. So this is more like an experiment.

• Docs https://docs.rs/respo
• Live Demo https://r.tiye.me/Respo/respo.rs/

Usage

Here is some preview of DOM syntax:

rust Ok( div() .class(ui_global()) .add_style(RespoStyle::default().padding(12.0).to_owned()) .add_children([ comp_counter(&states.pick("counter"), store.counted)?, comp_panel(&states.pick("panel"))?, comp_todolist(memo_caches, &states.pick("todolist"), &store.tasks)?, ]) .to_owned(), )

CSS-in-Rust:

rust static_styles!( style_remove_button, ( "&", RespoStyle::default() .width(CssSize::Px(16.0)) .height(CssSize::Px(16.0)) .margin(4.) .cursor("pointer".to_owned()) .margin4(0.0, 0.0, 0.0, 16.0) .color(CssColor::Hsl(0, 90, 90)), ), ("&:hover", RespoStyle::default().color(CssColor::Hsl(0, 90, 80))), );

Builtin styles, demonstrated:

| function | usages | | ------------------ | ------------------------------- | | ui_global | global styles | | ui_fullscreen | fullscreen styles | | ui_button | button styles | | ui_input | input styles | | ui_textarea | textarea styles | | ui_link | link styles | | ui_flex | flex:1 styles | | ui_expand | flex:1 styles with scrolls | | ui_center | flexbox center styles | | ui_row | flexbox row styles | | ui_column | flexbox column styles | | ui_row_center | flexbox row center styles | | ui_column_center | flexbox column center styles | | ui_row_around | flexbox row around styles | | ui_column_around | flexbox column around styles | | ui_row_evenly | flexbox row evenly styles | | ui_column_evenly | flexbox column evenly styles | | ui_row_parted | flexbox row between styles | | ui_column_parted | flexbox column between styles | | ui_row_middle | flexbox row between styles | | ui_column_middle | flexbox column between styles | | ui_font_code | code font family | | ui_font_normal | normal font family(Hind) | | ui_font_fancy | fancy font family(Josefin Sans) |

There are several dialog components in the demo. Syntax is not nice enough, so I'm not advertising it. But they work relatively good.

For more components, read code in src/app/, they are just variants like RespoNode::Component(..). It may be sugared in the future, not determined yet.

Store abstraction

Declaring a store:

```rust

[derive(Debug, Clone, Deserialize, Serialize)]

pub struct Store { pub states: StatesTree, // TODO you app data }

[derive(Clone, Debug, PartialEq, Eq)]

pub enum ActionOp { // TODO StatesChange(Vec, MaybeState), }

impl RespoAction for ActionOp { fn wrapstatesaction(cursor: &[String], a: MaybeState) -> Self { Self::StatesChange(cursor.to_vec(), a) } }

impl RespoStore for Store { type Action = ActionOp;

fn getstates(&self) -> StatesTree { self.states.toowned() } fn update(&mut self, op: Self::Action) -> Result<(), String> { match op { // TODO } Ok(()) } } ```

Declaring an app:

```rust struct App { store: Rc>, mounttarget: Node, memocaches: MemoCache>, }

impl RespoApp for App { type Model = Store; type Action = ActionOp;

fn getstore(&self) -> Rc> { self.store.clone() } fn getmounttarget(&self) -> &websys::Node { &self.mounttarget } fn getmemocaches(&self) -> MemoCache> { self.memocaches.to_owned() }

fn dispatch(store: &mut RefMut, op: Self::Action) -> Result<(), String> { store.update(op) }

fn view(store: Ref, memo_caches: MemoCache>) -> Result, String> { let states = &store.states; // util::log!("global store: {:?}", store);

Ok(
  div()
    .class(ui_global())
    .add_style(RespoStyle::default().padding(12.0).to_owned())
    .add_children([
      comp_counter(&states.pick("counter"), store.counted)?,
      comp_panel(&states.pick("panel"))?,
      comp_todolist(memo_caches, &states.pick("todolist"), &store.tasks)?,
    ])
    .to_owned(),
)

} } ```

Mounting app:

```rust let app = App { mounttarget: queryselectnode(".app").expect("mount target"), store: Rc::new(RefCell::new(Store { counted: 0, states: StatesTree::default(), tasks: vec![], })), memocaches: MemoCache::default(), };

app.render_loop().expect("app render"); ```

License

Apache License 2.0 .