feat(amazonq): implement inlineCompletionWithReferences

plugins/amazonq/shared/jetbrains-community/src/software/aws/toolkits/jetbrains/services/amazonq/lsp/AmazonQLanguageServer.kt

@@ -9,13 +9,18 @@ import org.eclipse.lsp4j.jsonrpc.services.JsonRequest
 import org.eclipse.lsp4j.services.LanguageServer
 import software.aws.toolkits.jetbrains.services.amazonq.lsp.model.aws.credentials.UpdateCredentialsPayload
 import software.aws.toolkits.jetbrains.services.amazonq.lsp.model.aws.dependencies.DidChangeDependencyPathsParams
+import software.aws.toolkits.jetbrains.services.amazonq.lsp.model.aws.textDocument.InlineCompletionListWithReferences
+import software.aws.toolkits.jetbrains.services.amazonq.lsp.model.aws.textDocument.InlineCompletionWithReferencesParams
 import java.util.concurrent.CompletableFuture
 
 /**
  * Remote interface exposed by the Amazon Q language server
  */
 @Suppress("unused")
 interface AmazonQLanguageServer : LanguageServer {
+    @JsonRequest("aws/textDocument/inlineCompletionWithReferences")
+    fun inlineCompletionWithReferences(params: InlineCompletionWithReferencesParams): CompletableFuture<InlineCompletionListWithReferences>
+
     @JsonNotification("aws/didChangeDependencyPaths")
     fun didChangeDependencyPaths(params: DidChangeDependencyPathsParams): CompletableFuture<Unit>
 

plugins/amazonq/shared/jetbrains-community/src/software/aws/toolkits/jetbrains/services/amazonq/lsp/model/aws/textDocument/InlineCompletionContext.kt

@@ -0,0 +1,9 @@
+// Copyright 2025 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+// SPDX-License-Identifier: Apache-2.0
+
+package software.aws.toolkits.jetbrains.services.amazonq.lsp.model.aws.textDocument
+
+data class InlineCompletionContext(
+    var triggerKind: InlineCompletionTriggerKind,
+    var selectedCompletionInfo: SelectedCompletionInfo? = null,
+)

plugins/amazonq/shared/jetbrains-community/src/software/aws/toolkits/jetbrains/services/amazonq/lsp/model/aws/textDocument/InlineCompletionItem.kt

@@ -0,0 +1,10 @@
+// Copyright 2025 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+// SPDX-License-Identifier: Apache-2.0
+
+package software.aws.toolkits.jetbrains.services.amazonq.lsp.model.aws.textDocument
+
+data class InlineCompletionItem(
+    var itemId: String,
+    var insertText: String,
+    var references: List<InlineCompletionReference>,
+)

plugins/amazonq/shared/jetbrains-community/src/software/aws/toolkits/jetbrains/services/amazonq/lsp/model/aws/textDocument/InlineCompletionListWithReferences.kt

@@ -0,0 +1,9 @@
+// Copyright 2025 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+// SPDX-License-Identifier: Apache-2.0
+
+package software.aws.toolkits.jetbrains.services.amazonq.lsp.model.aws.textDocument
+
+data class InlineCompletionListWithReferences(
+    var items: List<InlineCompletionItem>,
+    var sessionId: String,
+)

plugins/amazonq/shared/jetbrains-community/src/software/aws/toolkits/jetbrains/services/amazonq/lsp/model/aws/textDocument/InlineCompletionReference.kt

@@ -0,0 +1,11 @@
+// Copyright 2025 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+// SPDX-License-Identifier: Apache-2.0
+
+package software.aws.toolkits.jetbrains.services.amazonq.lsp.model.aws.textDocument
+
+data class InlineCompletionReference(
+    var referenceName: String,
+    var referenceUrl: String,
+    var licenseName: String,
+    var position: InlineCompletionReferencePosition,
+)

plugins/amazonq/shared/jetbrains-community/src/software/aws/toolkits/jetbrains/services/amazonq/lsp/model/aws/textDocument/InlineCompletionReferencePosition.kt

@@ -0,0 +1,9 @@
+// Copyright 2025 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+// SPDX-License-Identifier: Apache-2.0
+
+package software.aws.toolkits.jetbrains.services.amazonq.lsp.model.aws.textDocument
+
+data class InlineCompletionReferencePosition(
+    var startCharacter: Int = 0,
+    var endCharacter: Int = 0,
+)

plugins/amazonq/shared/jetbrains-community/src/software/aws/toolkits/jetbrains/services/amazonq/lsp/model/aws/textDocument/InlineCompletionTriggerKind.kt

@@ -0,0 +1,9 @@
+// Copyright 2025 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+// SPDX-License-Identifier: Apache-2.0
+
+package software.aws.toolkits.jetbrains.services.amazonq.lsp.model.aws.textDocument
+
+enum class InlineCompletionTriggerKind(val value: Int) {
+    Invoke(0),
+    Automatic(1),
+}

plugins/amazonq/shared/jetbrains-community/src/software/aws/toolkits/jetbrains/services/amazonq/lsp/model/aws/textDocument/InlineCompletionWithReferencesParams.kt

@@ -0,0 +1,10 @@
+// Copyright 2025 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+// SPDX-License-Identifier: Apache-2.0
+
+package software.aws.toolkits.jetbrains.services.amazonq.lsp.model.aws.textDocument
+
+import org.eclipse.lsp4j.TextDocumentPositionAndWorkDoneProgressParams
+
+data class InlineCompletionWithReferencesParams(
+    var context: InlineCompletionContext,
+) : TextDocumentPositionAndWorkDoneProgressParams()

plugins/amazonq/shared/jetbrains-community/src/software/aws/toolkits/jetbrains/services/amazonq/lsp/model/aws/textDocument/SelectedCompletionInfo.kt

@@ -0,0 +1,11 @@
+// Copyright 2025 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+// SPDX-License-Identifier: Apache-2.0
+
+package software.aws.toolkits.jetbrains.services.amazonq.lsp.model.aws.textDocument
+
+import org.eclipse.lsp4j.Range
+
+data class SelectedCompletionInfo(
+    var text: String,
+    var range: Range,
+)

plugins/amazonq/shared/jetbrains-community/src/software/aws/toolkits/jetbrains/services/amazonq/lsp/textdocument/TextDocumentServiceHandler.kt

@@ -3,8 +3,14 @@
 
 package software.aws.toolkits.jetbrains.services.amazonq.lsp.textdocument
 
+import com.intellij.codeInsight.lookup.Lookup
+import com.intellij.codeInsight.lookup.LookupEvent
+import com.intellij.codeInsight.lookup.LookupListener
+import com.intellij.codeInsight.lookup.LookupManagerListener
+import com.intellij.codeInsight.lookup.impl.LookupImpl
 import com.intellij.openapi.Disposable
 import com.intellij.openapi.editor.Document
+import com.intellij.openapi.editor.Editor
 import com.intellij.openapi.fileEditor.FileDocumentManager
 import com.intellij.openapi.fileEditor.FileDocumentManagerListener
 import com.intellij.openapi.fileEditor.FileEditorManager
@@ -19,11 +25,15 @@
 import org.eclipse.lsp4j.DidCloseTextDocumentParams
 import org.eclipse.lsp4j.DidOpenTextDocumentParams
 import org.eclipse.lsp4j.DidSaveTextDocumentParams
+import org.eclipse.lsp4j.Position
 import org.eclipse.lsp4j.TextDocumentContentChangeEvent
 import org.eclipse.lsp4j.TextDocumentIdentifier
 import org.eclipse.lsp4j.TextDocumentItem
 import org.eclipse.lsp4j.VersionedTextDocumentIdentifier
 import software.aws.toolkits.jetbrains.services.amazonq.lsp.AmazonQLspService
+import software.aws.toolkits.jetbrains.services.amazonq.lsp.model.aws.textDocument.InlineCompletionContext
+import software.aws.toolkits.jetbrains.services.amazonq.lsp.model.aws.textDocument.InlineCompletionTriggerKind
+import software.aws.toolkits.jetbrains.services.amazonq.lsp.model.aws.textDocument.InlineCompletionWithReferencesParams
 import software.aws.toolkits.jetbrains.services.amazonq.lsp.util.FileUriUtil.toUriString
 import software.aws.toolkits.jetbrains.utils.pluginAwareExecuteOnPooledThread
 
@@ -32,7 +42,8 @@
     serverInstance: Disposable,
 ) : FileDocumentManagerListener,
     FileEditorManagerListener,
-    BulkFileListener {
+    BulkFileListener,
+    LookupManagerListener {
 
     init {
         // didOpen & didClose events
@@ -52,8 +63,59 @@
             FileDocumentManagerListener.TOPIC,
             this
         )
+
+        // aws/textDocument/inlineCompletionWithReferences events
+        project.messageBus.connect(serverInstance).subscribe(
+            LookupManagerListener.TOPIC,
+            this
+        )
     }
 
+    override fun activeLookupChanged(oldLookup: Lookup?, newLookup: Lookup?) {
+        if (oldLookup != null || newLookup == null) return
+
+        newLookup.addLookupListener(object : LookupListener {
+            override fun itemSelected(event: LookupEvent) {
+                val editor = event.lookup.editor
+                if (!(event.lookup as LookupImpl).isShown) {
+                    cleanup()
+                    return
+                }
+
+                handleInlineCompletion(editor)
+                cleanup()
+            }
+
+            override fun lookupCanceled(event: LookupEvent) {
+                cleanup()
+            }
+
+            private fun cleanup() {
+                newLookup.removeLookupListener(this)
+            }
+        })
+    }
+
+    private fun handleInlineCompletion(editor: Editor) {
+        AmazonQLspService.executeIfRunning(project) { server ->
+            val params = buildInlineCompletionParams(editor)
+            server.inlineCompletionWithReferences(params)
+        }
+    }
+
+    private fun buildInlineCompletionParams(editor: Editor): InlineCompletionWithReferencesParams =
+        InlineCompletionWithReferencesParams(
+            context = InlineCompletionContext(
+                triggerKind = InlineCompletionTriggerKind.Invoke
+            )
+        ).apply {
+            textDocument = TextDocumentIdentifier(toUriString(editor.virtualFile))
+            position = Position(
+                editor.caretModel.primaryCaret.visualPosition.line,
+                editor.caretModel.primaryCaret.offset
+            )
+        }
+
     override fun beforeDocumentSaving(document: Document) {
         AmazonQLspService.executeIfRunning(project) { languageServer ->
             val file = FileDocumentManager.getInstance().getFile(document) ?: return@executeIfRunning