feat(napi): add support for weak references

examples/napi/__test__/typegen.spec.ts.md

@@ -278,10 +278,12 @@ Generated by [AVA](https://avajs.dev).
     export type CSSRuleList = CssRuleList␊
     export class CssRuleList {␊
       getRules(): Array<string>␊
+      get parentStyleSheet(): CSSStyleSheet␊
+      get name(): string | null␊
     }␊
     export type CSSStyleSheet = CssStyleSheet␊
     export class CssStyleSheet {␊
-      constructor(rules: Array<string>)␊
+      constructor(name: string, rules: Array<string>)␊
       get rules(): CssRuleList␊
       anotherCssStyleSheet(): AnotherCssStyleSheet␊
     }␊

examples/napi/__test__/values.spec.ts

@@ -202,9 +202,11 @@ test('should be able to create object reference and shared reference', (t) => {
 
 test('should be able to into_reference', (t) => {
   const rules = ['body: { color: red }', 'div: { color: blue }']
-  const sheet = new CssStyleSheet(rules)
+  const sheet = new CssStyleSheet('test.css', rules)
   t.is(sheet.rules, sheet.rules)
   t.deepEqual(sheet.rules.getRules(), rules)
+  t.is(sheet.rules.parentStyleSheet, sheet)
+  t.is(sheet.rules.name, 'test.css')
   const anotherStyleSheet = sheet.anotherCssStyleSheet()
   t.is(anotherStyleSheet.rules, sheet.rules)
 })

examples/napi/index.d.ts

@@ -268,10 +268,12 @@ export class JsRemote {
 export type CSSRuleList = CssRuleList
 export class CssRuleList {
   getRules(): Array<string>
+  get parentStyleSheet(): CSSStyleSheet
+  get name(): string | null
 }
 export type CSSStyleSheet = CssStyleSheet
 export class CssStyleSheet {
-  constructor(rules: Array<string>)
+  constructor(name: string, rules: Array<string>)
   get rules(): CssRuleList
   anotherCssStyleSheet(): AnotherCssStyleSheet
 }

examples/napi/src/reference.rs

@@ -64,6 +64,7 @@ struct OwnedStyleSheet {
 #[napi]
 pub struct CSSRuleList {
   owned: Rc<RefCell<OwnedStyleSheet>>,
+  parent: WeakReference<CSSStyleSheet>,
 }
 
 #[napi]
@@ -72,10 +73,26 @@ impl CSSRuleList {
   pub fn get_rules(&self) -> Vec<String> {
     self.owned.borrow().rules.to_vec()
   }
+
+  #[napi(getter)]
+  pub fn parent_style_sheet(&self) -> WeakReference<CSSStyleSheet> {
+    self.parent.clone()
+  }
+
+  #[napi(getter)]
+  pub fn name(&self, env: Env) -> Result<Option<String>> {
+    Ok(
+      self
+        .parent
+        .upgrade(env)?
+        .map(|stylesheet| stylesheet.name.clone()),
+    )
+  }
 }
 
 #[napi]
 pub struct CSSStyleSheet {
+  name: String,
   inner: Rc<RefCell<OwnedStyleSheet>>,
   rules: Option<Reference<CSSRuleList>>,
 }
@@ -97,13 +114,21 @@ impl AnotherCSSStyleSheet {
 #[napi]
 impl CSSStyleSheet {
   #[napi(constructor)]
-  pub fn new(rules: Vec<String>) -> Result<Self> {
+  pub fn new(name: String, rules: Vec<String>) -> Result<Self> {
     let inner = Rc::new(RefCell::new(OwnedStyleSheet { rules }));
-    Ok(CSSStyleSheet { inner, rules: None })
+    Ok(CSSStyleSheet {
+      name,
+      inner,
+      rules: None,
+    })
   }
 
   #[napi(getter)]
-  pub fn rules(&mut self, env: Env) -> Result<Reference<CSSRuleList>> {
+  pub fn rules(
+    &mut self,
+    env: Env,
+    reference: Reference<CSSStyleSheet>,
+  ) -> Result<Reference<CSSRuleList>> {
     if let Some(rules) = &self.rules {
       return rules.clone(env);
     }
@@ -111,6 +136,7 @@ impl CSSStyleSheet {
     let rules = CSSRuleList::into_reference(
       CSSRuleList {
         owned: self.inner.clone(),
+        parent: reference.downgrade(),
       },
       env,
     )?;