[IDE] Move KotlinJavaScriptMetaFileDecompiler to kotlin.git

KTIJ-27752

analysis/decompiled/decompiler-js/build.gradle.kts

@@ -0,0 +1,27 @@
+plugins {
+    kotlin("jvm")
+    id("jps-compatible")
+}
+
+sourceSets {
+    "main" { projectDefault() }
+    "test" { projectDefault() }
+}
+
+projectTest {
+    workingDir = rootDir
+}
+
+dependencies {
+    api(project(":core:deserialization"))
+    api(project(":compiler:psi"))
+    api(project(":analysis:decompiled:decompiler-to-file-stubs"))
+    api(project(":analysis:decompiled:decompiler-to-psi"))
+    api(project(":js:js.serializer"))
+    compileOnly(intellijCore())
+
+    testImplementation(projectTests(":compiler:tests-common"))
+    testImplementation(projectTests(":compiler:tests-common-new"))
+}
+
+testsJar()

analysis/decompiled/decompiler-js/src/org/jetbrains/kotlin/analysis/decompiler/js/KotlinJavaScriptMetaFileDecompiler.kt

@@ -0,0 +1,40 @@
+/*
+ * Copyright 2010-2023 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
+ */
+
+package org.jetbrains.kotlin.analysis.decompiler.js
+
+import com.intellij.openapi.vfs.VirtualFile
+import org.jetbrains.kotlin.analysis.decompiler.psi.KotlinMetadataDecompiler
+import org.jetbrains.kotlin.analysis.decompiler.stub.file.KotlinMetadataStubBuilder
+import org.jetbrains.kotlin.metadata.ProtoBuf
+import org.jetbrains.kotlin.metadata.js.JsProtoBuf
+import org.jetbrains.kotlin.psi.stubs.KotlinStubVersions
+import org.jetbrains.kotlin.serialization.js.DynamicTypeDeserializer
+import org.jetbrains.kotlin.serialization.js.JsSerializerProtocol
+import org.jetbrains.kotlin.utils.JsMetadataVersion
+import java.io.ByteArrayInputStream
+
+class KotlinJavaScriptMetaFileDecompiler : KotlinMetadataDecompiler<JsMetadataVersion>(
+    fileType = KotlinJavaScriptMetaFileType,
+    serializerProtocol = { JsSerializerProtocol },
+    flexibleTypeDeserializer = DynamicTypeDeserializer,
+    expectedBinaryVersion = { JsMetadataVersion.INSTANCE },
+    invalidBinaryVersion = { JsMetadataVersion.INVALID_VERSION },
+    stubVersion = KotlinStubVersions.JS_STUB_VERSION
+) {
+    override fun readFile(bytes: ByteArray, file: VirtualFile): KotlinMetadataStubBuilder.FileWithMetadata {
+        val stream = ByteArrayInputStream(bytes)
+
+        val version = JsMetadataVersion.readFrom(stream)
+        if (!version.isCompatible()) {
+            return KotlinMetadataStubBuilder.FileWithMetadata.Incompatible(version)
+        }
+
+        JsProtoBuf.Header.parseDelimitedFrom(stream)
+
+        val proto = ProtoBuf.PackageFragment.parseFrom(stream, JsSerializerProtocol.extensionRegistry)
+        return KotlinMetadataStubBuilder.FileWithMetadata.Compatible(proto, version, JsSerializerProtocol)
+    }
+}

analysis/decompiled/decompiler-js/src/org/jetbrains/kotlin/analysis/decompiler/js/KotlinJavaScriptMetaFileType.kt

@@ -0,0 +1,23 @@
+/*
+ * Copyright 2010-2023 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
+ */
+
+package org.jetbrains.kotlin.analysis.decompiler.js
+
+import com.intellij.openapi.fileTypes.FileType
+import com.intellij.openapi.vfs.VirtualFile
+import org.jetbrains.kotlin.analysis.decompiler.psi.KotlinLabelProviderService
+import org.jetbrains.kotlin.serialization.js.KotlinJavascriptSerializationUtil
+
+object KotlinJavaScriptMetaFileType : FileType {
+    override fun getName() = "KJSM"
+    override fun getDescription() = KotlinLabelProviderService.getService()?.getLabelForKotlinJavaScriptMetaFileType()
+        ?: "Kotlin JavaScript meta file"
+
+    override fun getDefaultExtension() = KotlinJavascriptSerializationUtil.CLASS_METADATA_FILE_EXTENSION
+    override fun getIcon() = null
+    override fun isBinary() = true
+    override fun isReadOnly() = true
+    override fun getCharset(file: VirtualFile, content: ByteArray) = null
+}

analysis/decompiled/decompiler-to-psi/src/org/jetbrains/kotlin/analysis/decompiler/psi/KotlinLabelProviderService.kt

@@ -10,6 +10,7 @@ import com.intellij.openapi.application.ApplicationManager
 abstract class KotlinLabelProviderService {
     abstract fun getLabelForBuiltInFileType(): String
     abstract fun getLabelForKlibMetaFileType(): String
+    abstract fun getLabelForKotlinJavaScriptMetaFileType(): String
 
     companion object {
         fun getService(): KotlinLabelProviderService? =