Add support for type parameters and nullable property in handleMixinAndInterfaces

Author: Bashamega

inputfiles/overridingTypes.jsonc

@@ -1310,26 +1310,6 @@
                     }
                 }
             },
-            "IDBRequest": {
-                "properties": {
-                    "property": {
-                        "source": {
-                            "name": "source",
-                            "nullable": false
-                        },
-                        "result": {
-                            "name": "result",
-                            "overrideType": "T"
-                        }
-                    }
-                },
-                "typeParameters": [
-                    {
-                        "name": "T",
-                        "default": "any"
-                    }
-                ]
-            },
             "ImageBitmapRenderingContext": {
                 "properties": {
                     "property": {

inputfiles/patches/indexeddb.kdl

@@ -0,0 +1,5 @@
+interface IDBRequest {
+   property source nullable=#false
+   property result overrideType=T
+   typeParameters T default=any
+}

src/build/patches.ts

@@ -169,6 +169,7 @@ function handleMixinAndInterfaces(
   const event: Event[] = [];
   const property: Record<string, Partial<Property>> = {};
   let method: Record<string, DeepPartial<OverridableMethod>> = {};
+  let typeParameters = {}
 
   for (const child of node.children) {
     switch (child.name) {
@@ -188,12 +189,17 @@ function handleMixinAndInterfaces(
         });
         break;
       }
+      case "typeParameters": {
+        typeParameters = handleTypeParameters(child);
+        break;
+      }
       default:
         throw new Error(`Unknown node name: ${child.name}`);
     }
   }
 
   const interfaceObject = type === "interface" && {
+    ...typeParameters,
     ...optionalMember("exposed", "string", node.properties?.exposed),
     ...optionalMember("deprecated", "string", node.properties?.deprecated),
     ...optionalMember(
@@ -259,6 +265,7 @@ function handleProperty(child: Node): Partial<Property> {
       : optionalMember("type", "string", child.properties?.type)),
     ...optionalMember("readonly", "boolean", child.properties?.readonly),
     ...optionalMember("deprecated", "string", child.properties?.deprecated),
+    ...optionalMember("nullable", "boolean", child.properties?.nullable),
   };
 }