clean up attribute parsing
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Evan Almloff committed
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b68a1f57e0
commit
8c47dfaf78
8 files changed
+278
-261
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+26
-161
@@ -8,7 +8,7 @@ use syn::{
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parse::{Parse, ParseBuffer, ParseStream},
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punctuated::Punctuated,
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spanned::Spanned,
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Error, Expr, Ident, LitStr, Result, Token,
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Expr, Ident, LitStr, Result, Token,
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};
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// =======================================
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@@ -34,7 +34,6 @@ impl Parse for Element {
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let mut attributes: Vec<ElementAttrNamed> = vec![];
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let mut children: Vec<BodyNode> = vec![];
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let mut key = None;
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let mut _el_ref = None;
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// parse fields with commas
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// break when we don't get this pattern anymore
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@@ -49,19 +48,20 @@ impl Parse for Element {
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content.parse::<Token![:]>()?;
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if content.peek(LitStr) {
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let value = if content.peek(LitStr) {
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let value = content.parse()?;
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attributes.push(ElementAttrNamed {
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el_name: el_name.clone(),
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attr: ElementAttr::CustomAttrText { name, value },
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});
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ElementAttrValue::AttrLiteral(value)
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} else {
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let value = content.parse::<Expr>()?;
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attributes.push(ElementAttrNamed {
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el_name: el_name.clone(),
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attr: ElementAttr::CustomAttrExpression { name, value },
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});
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}
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ElementAttrValue::AttrExpr(value)
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};
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attributes.push(ElementAttrNamed {
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el_name: el_name.clone(),
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attr: ElementAttr {
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name: ElementAttrName::Custom(name),
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value,
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},
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});
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if content.is_empty() {
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break;
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@@ -86,9 +86,9 @@ impl Parse for Element {
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if name_str.starts_with("on") {
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attributes.push(ElementAttrNamed {
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el_name: el_name.clone(),
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attr: ElementAttr::EventTokens {
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name,
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tokens: content.parse()?,
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attr: ElementAttr {
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name: ElementAttrName::BuiltIn(name),
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value: ElementAttrValue::EventTokens(content.parse()?),
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},
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});
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} else {
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@@ -96,26 +96,21 @@ impl Parse for Element {
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"key" => {
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key = Some(content.parse()?);
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}
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"classes" => todo!("custom class list not supported yet"),
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// "namespace" => todo!("custom namespace not supported yet"),
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"node_ref" => {
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_el_ref = Some(content.parse::<Expr>()?);
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}
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_ => {
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if content.peek(LitStr) {
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attributes.push(ElementAttrNamed {
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el_name: el_name.clone(),
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attr: ElementAttr::AttrText {
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name,
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value: content.parse()?,
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attr: ElementAttr {
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name: ElementAttrName::BuiltIn(name),
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value: ElementAttrValue::AttrLiteral(content.parse()?),
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},
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});
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} else {
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attributes.push(ElementAttrNamed {
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el_name: el_name.clone(),
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attr: ElementAttr::AttrExpression {
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name,
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value: content.parse()?,
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attr: ElementAttr {
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name: ElementAttrName::BuiltIn(name),
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value: ElementAttrValue::AttrExpr(content.parse()?),
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},
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});
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}
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@@ -137,6 +132,9 @@ impl Parse for Element {
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break;
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}
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// Deduplicate any attributes that can be combined
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// For example, if there are two `class` attributes, combine them into one
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while !content.is_empty() {
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if (content.peek(LitStr) && content.peek2(Token![:])) && !content.peek3(Token![:]) {
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attr_after_element!(content.span());
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@@ -177,12 +175,12 @@ impl ToTokens for Element {
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let listeners = self
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.attributes
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.iter()
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.filter(|f| matches!(f.attr, ElementAttr::EventTokens { .. }));
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.filter(|f| matches!(f.attr.value, ElementAttrValue::EventTokens { .. }));
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let attr = self
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.attributes
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.iter()
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.filter(|f| !matches!(f.attr, ElementAttr::EventTokens { .. }));
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.filter(|f| !matches!(f.attr.value, ElementAttrValue::EventTokens { .. }));
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tokens.append_all(quote! {
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__cx.element(
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@@ -264,136 +262,3 @@ impl ToTokens for ElementName {
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}
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}
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}
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#[derive(PartialEq, Eq, Clone, Debug, Hash)]
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pub enum ElementAttr {
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/// `attribute: "value"`
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AttrText { name: Ident, value: IfmtInput },
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/// `attribute: true`
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AttrExpression { name: Ident, value: Expr },
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/// `"attribute": "value"`
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CustomAttrText { name: LitStr, value: IfmtInput },
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/// `"attribute": true`
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CustomAttrExpression { name: LitStr, value: Expr },
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// /// onclick: move |_| {}
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// EventClosure { name: Ident, closure: ExprClosure },
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/// onclick: {}
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EventTokens { name: Ident, tokens: Expr },
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}
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impl ElementAttr {
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pub fn start(&self) -> Span {
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match self {
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ElementAttr::AttrText { name, .. } => name.span(),
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ElementAttr::AttrExpression { name, .. } => name.span(),
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ElementAttr::CustomAttrText { name, .. } => name.span(),
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ElementAttr::CustomAttrExpression { name, .. } => name.span(),
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ElementAttr::EventTokens { name, .. } => name.span(),
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}
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}
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pub fn is_expr(&self) -> bool {
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matches!(
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self,
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ElementAttr::AttrExpression { .. }
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| ElementAttr::CustomAttrExpression { .. }
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| ElementAttr::EventTokens { .. }
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)
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}
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}
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#[derive(PartialEq, Eq, Clone, Debug, Hash)]
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pub struct ElementAttrNamed {
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pub el_name: ElementName,
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pub attr: ElementAttr,
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}
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impl ToTokens for ElementAttrNamed {
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fn to_tokens(&self, tokens: &mut TokenStream2) {
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let ElementAttrNamed { el_name, attr } = self;
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let ns = |name| match el_name {
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ElementName::Ident(i) => quote! { dioxus_elements::#i::#name.1 },
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ElementName::Custom(_) => quote! { None },
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};
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let volitile = |name| match el_name {
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ElementName::Ident(_) => quote! { #el_name::#name.2 },
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ElementName::Custom(_) => quote! { false },
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};
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let attribute = |name: &Ident| match el_name {
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ElementName::Ident(_) => quote! { #el_name::#name.0 },
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ElementName::Custom(_) => {
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let as_string = name.to_string();
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quote!(#as_string)
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}
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};
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let attribute = match attr {
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ElementAttr::AttrText { name, value } => {
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let ns = ns(name);
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let volitile = volitile(name);
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let attribute = attribute(name);
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quote! {
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__cx.attr(
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#attribute,
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#value,
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#ns,
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#volitile
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)
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}
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}
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ElementAttr::AttrExpression { name, value } => {
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let ns = ns(name);
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let volitile = volitile(name);
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let attribute = attribute(name);
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quote! {
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__cx.attr(
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#attribute,
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#value,
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#ns,
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#volitile
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)
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}
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}
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ElementAttr::CustomAttrText { name, value } => {
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quote! {
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__cx.attr(
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#name,
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#value,
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None,
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false
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)
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}
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}
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ElementAttr::CustomAttrExpression { name, value } => {
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quote! {
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__cx.attr(
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#name,
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#value,
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None,
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false
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)
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}
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}
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ElementAttr::EventTokens { name, tokens } => {
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quote! {
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dioxus_elements::events::#name(__cx, #tokens)
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}
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}
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};
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tokens.append_all(attribute);
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}
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}
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// ::dioxus::core::Attribute {
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// name: stringify!(#name),
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// namespace: None,
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// volatile: false,
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// mounted_node: Default::default(),
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// value: ::dioxus::core::AttributeValue::Text(#value),
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// }
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