feat: fix outline

helpers/newOutline.ts

@@ -0,0 +1,100 @@
+import {
+  JSONArrayValue,
+  JSONObjectMember,
+  JSONObjectValue,
+  JSONValue,
+} from "./jsonParse"
+
+type RootEntry =
+  | {
+      kind: "RootObject"
+      astValue: JSONObjectValue
+    }
+  | {
+      kind: "RootArray"
+      astValue: JSONArrayValue
+    }
+
+type ObjectMemberEntry = {
+  kind: "ObjectMember"
+  name: string
+  astValue: JSONObjectMember
+  astParent: JSONObjectValue
+}
+
+type ArrayMemberEntry = {
+  kind: "ArrayMember"
+  index: number
+  astValue: JSONValue
+  astParent: JSONArrayValue
+}
+
+type PathEntry = RootEntry | ObjectMemberEntry | ArrayMemberEntry
+
+export function getJSONOutlineAtPos(
+  jsonRootAst: JSONObjectValue | JSONArrayValue,
+  posIndex: number
+): PathEntry[] | null {
+  try {
+    const rootObj = jsonRootAst
+
+    if (posIndex > rootObj.end || posIndex < rootObj.start)
+      throw new Error("Invalid position")
+
+    let current: JSONValue = rootObj
+
+    const path: PathEntry[] = []
+
+    if (rootObj.kind === "Object") {
+      path.push({
+        kind: "RootObject",
+        astValue: rootObj,
+      })
+    } else {
+      path.push({
+        kind: "RootArray",
+        astValue: rootObj,
+      })
+    }
+
+    while (current.kind === "Object" || current.kind === "Array") {
+      if (current.kind === "Object") {
+        const next: JSONObjectMember | undefined = current.members.find(
+          (member) => member.start <= posIndex && member.end >= posIndex
+        )
+
+        if (!next) throw new Error("Couldn't find child")
+
+        path.push({
+          kind: "ObjectMember",
+          name: next.key.value,
+          astValue: next,
+          astParent: current,
+        })
+
+        current = next.value
+      } else {
+        const nextIndex = current.values.findIndex(
+          (value) => value.start <= posIndex && value.end >= posIndex
+        )
+
+        if (nextIndex < 0) throw new Error("Couldn't find child")
+
+        const next: JSONValue = current.values[nextIndex]
+
+        path.push({
+          kind: "ArrayMember",
+          index: nextIndex,
+          astValue: next,
+          astParent: current,
+        })
+
+        current = next
+      }
+    }
+
+    return path
+  } catch (e: any) {
+    return null
+  }
+}