release: WRNexusJS 0.3.5

editors/vscode/src/component-metadata.js

@@ -69,6 +69,7 @@ function parseComponentMetadata(source, uri = null) {
 
   const propsKeyword = /\bprops\s*\{/.exec(source.slice(declaration.index));
   const props = [];
+  const events = [];
   if (propsKeyword) {
     const start = declaration.index + propsKeyword.index;
     const openingBrace = source.indexOf("{", start);
@@ -94,9 +95,12 @@ function parseComponentMetadata(source, uri = null) {
         options: inferOptions(source, name),
       });
     }
+    const eventPattern = /^\s*@event\s+([A-Za-z_$][\w$]*)\s*=\s*function\s*$/gm;
+    let eventMatch;
+    while ((eventMatch = eventPattern.exec(body)) !== null) events.push(eventMatch[1]);
   }
 
-  return { kind: declaration[1], name: declaration[2], props, uri };
+  return { kind: declaration[1], name: declaration[2], props, events, uri };
 }
 
 function unwrapAttributeValue(value) {
@@ -173,6 +177,7 @@ function validateComponentTags(source, components) {
     if (!component) continue;
     const provided = new Map(tag.attributes.map((attribute) => [attribute.name, attribute]));
     const declared = new Map(component.props.map((prop) => [prop.name, prop]));
+    const declaredEvents = new Set(component.events || []);
 
     for (const prop of component.props) {
       if (prop.required && !provided.has(prop.name)) {
@@ -187,6 +192,19 @@ function validateComponentTags(source, components) {
     }
 
     for (const attribute of tag.attributes) {
+      if (attribute.name.startsWith("@")) {
+        const eventName = attribute.name.slice(1);
+        if (!declaredEvents.has(eventName)) {
+          diagnostics.push({
+            severity: "warning",
+            code: "wrn-unknown-component-event",
+            message: `Unknown event \`${eventName}\` on <${tag.name}>.`,
+            start: attribute.nameStart,
+            end: attribute.nameEnd,
+          });
+        }
+        continue;
+      }
       const prop = declared.get(attribute.name);
       if (!prop) {
         diagnostics.push({