refactor(devins-lang): introduce DevInFileStub class for improved PSI file handling and stub serialization.

Author: phodal

exts/devins-lang/src/main/kotlin/cc/unitmesh/devti/language/psi/DevInFile.kt

@@ -7,8 +7,6 @@ import com.intellij.openapi.fileTypes.FileType
 import com.intellij.openapi.project.Project
 import com.intellij.openapi.vfs.VirtualFileManager
 import com.intellij.psi.*
-import com.intellij.psi.stubs.*
-import com.intellij.psi.tree.IStubFileElementType
 import java.util.*
 
 class DevInFile(viewProvider: FileViewProvider) : PsiFileBase(viewProvider, DevInLanguage.INSTANCE) {
@@ -40,26 +38,3 @@ class DevInFile(viewProvider: FileViewProvider) : PsiFileBase(viewProvider, DevI
     }
 }
 
-class DevInFileStub(file: DevInFile?, private val flags: Int) : PsiFileStubImpl<DevInFile>(file) {
-    override fun getType() = Type
-
-    object Type : IStubFileElementType<DevInFileStub>(DevInLanguage) {
-        override fun getStubVersion(): Int = 1
-
-        override fun getExternalId(): String = "devin.file"
-
-        override fun serialize(stub: DevInFileStub, dataStream: StubOutputStream) {
-            dataStream.writeByte(stub.flags)
-        }
-
-        override fun deserialize(dataStream: StubInputStream, parentStub: StubElement<*>?): DevInFileStub {
-            return DevInFileStub(null, dataStream.readUnsignedByte())
-        }
-
-        override fun getBuilder(): StubBuilder = object : DefaultStubBuilder() {
-            override fun createStubForFile(file: PsiFile): StubElement<*> {
-                return DevInFileStub(file as DevInFile, 0)
-            }
-        }
-    }
-}

exts/devins-lang/src/main/kotlin/cc/unitmesh/devti/language/psi/DevInFileStub.kt

@@ -0,0 +1,31 @@
+package cc.unitmesh.devti.language.psi
+
+import cc.unitmesh.devti.language.DevInLanguage
+import com.intellij.psi.PsiFile
+import com.intellij.psi.StubBuilder
+import com.intellij.psi.stubs.*
+import com.intellij.psi.tree.IStubFileElementType
+
+class DevInFileStub(file: DevInFile?, private val flags: Int) : PsiFileStubImpl<DevInFile>(file) {
+    override fun getType() = Type
+
+    object Type : IStubFileElementType<DevInFileStub>(DevInLanguage) {
+        override fun getStubVersion(): Int = 1
+
+        override fun getExternalId(): String = "devin.file"
+
+        override fun serialize(stub: DevInFileStub, dataStream: StubOutputStream) {
+            dataStream.writeByte(stub.flags)
+        }
+
+        override fun deserialize(dataStream: StubInputStream, parentStub: StubElement<*>?): DevInFileStub {
+            return DevInFileStub(null, dataStream.readUnsignedByte())
+        }
+
+        override fun getBuilder(): StubBuilder = object : DefaultStubBuilder() {
+            override fun createStubForFile(file: PsiFile): StubElement<*> {
+                return DevInFileStub(file as DevInFile, 0)
+            }
+        }
+    }
+}