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wip: providing content chunks with ednprovider
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8 changed files with 157 additions and 41 deletions
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@ -1,28 +1,141 @@
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use crate::*;
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use std::marker::PhantomData;
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use EdnItem::*;
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pub type EdnCallback<'a, O, State> =
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dyn Fn(&'a State)-> RenderBox<'a, O> + Send + Sync + 'a;
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pub type EdnRenderCallback<'a, O, State> =
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Box<EdnCallback<'a, O, State>>;
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/// Provides values to the template
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pub trait EdnViewData<E: Output> {
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fn get_bool (&self, _sym: EdnItem<&str>) -> bool {
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panic!("no content")
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pub trait EdnViewData<E: Output>:
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EdnProvide<bool> +
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EdnProvide<usize> +
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EdnProvide<E::Unit> +
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EdnProvide<Box<dyn Render<E>>>
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{
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fn get_bool (&self, item: EdnItem<&str>) -> bool {
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match &item {
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Num(0) => false,
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Num(_) => true,
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Sym(":true") | Sym(":t") => true,
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Sym(":false") | Sym(":f") => false,
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_ => EdnProvide::get_or_fail(self, &item)
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}
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}
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fn get_usize (&self, _sym: EdnItem<&str>) -> usize {
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panic!("no content")
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fn get_usize (&self, item: EdnItem<&str>) -> usize {
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match &item {
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Num(n) => *n,
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_ => EdnProvide::get_or_fail(self, &item)
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}
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}
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fn get_content <'a> (&'a self, _sym: EdnItem<&'a str>) -> RenderBox<'a, E> {
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panic!("no content")
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fn get_unit (&self, item: EdnItem<&str>) -> E::Unit {
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match &item {
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Num(n) => (*n as u16).into(),
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_ => EdnProvide::get_or_fail(self, &item)
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}
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}
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fn get_unit (&self, num: EdnItem<&str>) -> E::Unit {
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if let EdnItem::Num(n) = num { (n as u16).into() } else { panic!("not a number") }
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fn get_content <'a> (&'a self, item: EdnItem<&str>) -> Box<dyn Render<E> + 'a> where E: 'a {
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match item.to_ref() {
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Nil => Box::new(()),
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Exp(e) => if let [head, tail @ ..] = e.as_slice() {
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match (head, tail) {
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(Key("when"), [c, a]) => When(
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self.get_bool(c.to_ref()),
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self.get_content(a.to_ref())).boxed(),
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(Key("either"),[c, a, b]) => Either(
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self.get_bool(c.to_ref()),
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self.get_content(a.to_ref()),
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self.get_content(b.to_ref())).boxed(),
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(Key("align/c"), [a]) => Align::c(
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self.get_content(a.to_ref())).boxed(),
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(Key("align/x"), [a]) => Align::x(
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self.get_content(a.to_ref())).boxed(),
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(Key("align/y"), [a]) => Align::y(
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self.get_content(a.to_ref())).boxed(),
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(Key("align/n"), [a]) => Align::n(
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self.get_content(a.to_ref())).boxed(),
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(Key("align/s"), [a]) => Align::s(
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self.get_content(a.to_ref())).boxed(),
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(Key("align/e"), [a]) => Align::e(
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self.get_content(a.to_ref())).boxed(),
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(Key("align/w"), [a]) => Align::w(
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self.get_content(a.to_ref())).boxed(),
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(Key("align/nw"), [a]) => Align::nw(
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self.get_content(a.to_ref())).boxed(),
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(Key("align/ne"), [a]) => Align::ne(
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self.get_content(a.to_ref())).boxed(),
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(Key("align/sw"), [a]) => Align::sw(
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self.get_content(a.to_ref())).boxed(),
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(Key("align/se"), [a]) => Align::se(
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self.get_content(a.to_ref())).boxed(),
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(Key("bsp/a"), [a, b]) => Bsp::a(
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self.get_content(a.to_ref()), self.get_content(b.to_ref()),).boxed(),
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(Key("bsp/b"), [a, b]) => Bsp::b(
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self.get_content(a.to_ref()), self.get_content(b.to_ref()),).boxed(),
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(Key("bsp/e"), [a, b]) => Bsp::e(
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self.get_content(a.to_ref()), self.get_content(b.to_ref()),).boxed(),
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(Key("bsp/n"), [a, b]) => Bsp::n(
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self.get_content(a.to_ref()), self.get_content(b.to_ref()),).boxed(),
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(Key("bsp/s"), [a, b]) => Bsp::s(
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self.get_content(a.to_ref()), self.get_content(b.to_ref()),).boxed(),
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(Key("bsp/w"), [a, b]) => Bsp::w(
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self.get_content(a.to_ref()), self.get_content(b.to_ref()),).boxed(),
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(Key("fill/x"), [a]) => Fill::x(
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self.get_content(a.to_ref())).boxed(),
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(Key("fill/y"), [a]) => Fill::y(
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self.get_content(a.to_ref())).boxed(),
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(Key("fill/xy"), [a]) => Fill::xy(
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self.get_content(a.to_ref())).boxed(),
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(Key("fixed/x"), [x, a]) => Fixed::x(
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self.get_unit(x.to_ref()), self.get_content(a.to_ref())).boxed(),
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(Key("fixed/y"), [y, a]) => Fixed::y(
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self.get_unit(y.to_ref()), self.get_content(a.to_ref())).boxed(),
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(Key("fixed/xy"), [x, y, a]) => Fixed::xy(
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self.get_unit(x.to_ref()), self.get_unit(y.to_ref()), self.get_content(a.to_ref())).boxed(),
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(Key("max/x"), [x, a]) => Max::x(
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self.get_unit(x.to_ref()), self.get_content(a.to_ref())).boxed(),
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(Key("max/y"), [y, a]) => Max::y(
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self.get_unit(y.to_ref()), self.get_content(a.to_ref())).boxed(),
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(Key("push/x"), [x, a]) => Push::x(
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self.get_unit(x.to_ref()), self.get_content(a.to_ref())).boxed(),
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(Key("push/y"), [y, a]) => Push::y(
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self.get_unit(y.to_ref()), self.get_content(a.to_ref())).boxed(),
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(Key("pad/x"), [x, a]) => Padding::x(
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self.get_unit(x.to_ref()), self.get_content(a.to_ref())).boxed(),
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(Key("pad/y"), [y, a]) => Padding::y(
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self.get_unit(y.to_ref()), self.get_content(a.to_ref())).boxed(),
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(Key("pad/xy"), [x, y, a]) => Padding::xy(
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self.get_unit(x.to_ref()), self.get_unit(y.to_ref()), self.get_content(a.to_ref())).boxed(),
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(Key("grow/x"), [x, a]) => Margin::x(
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self.get_unit(x.to_ref()), self.get_content(a.to_ref())).boxed(),
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(Key("grow/y"), [y, a]) => Margin::y(
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self.get_unit(y.to_ref()), self.get_content(a.to_ref())).boxed(),
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(Key("grow/xy"), [x, y, a]) => Margin::xy(
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self.get_unit(x.to_ref()), self.get_unit(y.to_ref()), self.get_content(a.to_ref())).boxed(),
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_ => todo!("{:?} {:?}", &head, &tail)
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}
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} else {
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panic!("invalid expression: {e:?}")
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},
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_ => EdnProvide::get_or_fail(self, &item)
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}
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//panic!("no content")
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}
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}
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impl<E: Output, T> EdnViewData<E> for T where T:
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EdnProvide<bool> +
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EdnProvide<usize> +
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EdnProvide<E::Unit> +
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EdnProvide<Box<dyn Render<E>>>
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{}
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/// Renders from EDN source and context.
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#[derive(Default)]
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