From a52227dccf50f9e2d7df3262fd895918afbd36f2 Mon Sep 17 00:00:00 2001
From: azerr <azerr@redhat.com>
Date: Thu, 8 Jan 2026 14:30:51 +0100
Subject: [PATCH] Support for debugging Qute template in Java annotation

Signed-off-by: azerr <azerr@redhat.com>
---
 package.json                                  |  3 +-
 .../quteDebugAdapterTrackerFactory.ts         | 66 +++++++++++++++++--
 2 files changed, 64 insertions(+), 5 deletions(-)

diff --git a/package.json b/package.json
index 728364c8..3e367638 100644
--- a/package.json
+++ b/package.json
@@ -208,7 +208,8 @@
           "qute-html",
           "qute-json",
           "qute-yaml",
-          "qute-txt"
+          "qute-txt",
+          "java"
         ],
         "configurationAttributes": {
           "attach": {
diff --git a/src/qute/debugAdapter/quteDebugAdapterTrackerFactory.ts b/src/qute/debugAdapter/quteDebugAdapterTrackerFactory.ts
index bf76d258..a56579a4 100644
--- a/src/qute/debugAdapter/quteDebugAdapterTrackerFactory.ts
+++ b/src/qute/debugAdapter/quteDebugAdapterTrackerFactory.ts
@@ -5,6 +5,28 @@ interface ResponsePromise {
     timerStart: number;
 }
 
+interface JavaSourceLocationArguments {
+    javaElementUri: string;
+    typeName?: string;
+    method?: string;
+    annotation?: string;
+}
+
+interface JavaSourceLocationEventArguments {
+    id: string;
+    args: JavaSourceLocationArguments;
+}
+
+interface JavaSourceLocationEventResponse {
+    id: string;
+    response: JavaSourceLocationResponse;
+}
+
+interface JavaSourceLocationResponse {
+    javaFileUri?: string;
+    startLine?: number;
+}
+
 enum Trace {
     Off, Messages, Verbose
 }
@@ -55,6 +77,29 @@ export class QuteDebugAdapterTrackerFactory implements vscode.DebugAdapterTracke
                 if (message.type === 'response') {
                     handleResponse(message);
                 } else if (message.type === 'event') {
+                    if (message.event === 'qute/onResolveJavaSource') {
+                        // Collect startLine of the declared annotation 
+                        // which hosts Qute template
+                        // ex : @TemplateContents(value="Hello {name}!")
+                        //      record Hello(String name) 
+                        const args: JavaSourceLocationEventArguments = message.body;
+                        resolveJavaSourceForTemplate(args.args)
+                            .then((javaResponse: JavaSourceLocationResponse | null) => {
+                                const eventResponse: JavaSourceLocationEventResponse = {
+                                    id: args.id,
+                                    response: javaResponse
+                                };
+                                // The start line has been collected, notify the Qute debugger 
+                                // with this start line.
+                                session.customRequest('qute/onJavaSourceResolved', eventResponse);
+                            }).catch(err => {
+                                console.error("Failed to resolve Java source", err);
+                                session.customRequest('qute/onJavaSourceResolved', {
+                                    id: args.id,
+                                    response: null
+                                });
+                            });
+                    }
                     traceReceivedNotification(message);
                 }
             },
@@ -74,6 +119,19 @@ export class QuteDebugAdapterTrackerFactory implements vscode.DebugAdapterTracke
     }
 }
 
+async function resolveJavaSourceForTemplate(args: JavaSourceLocationArguments): Promise<JavaSourceLocationResponse | null> {
+    try {
+        // Appel JDT LS pour récupérer la source Java
+        const result = await vscode.commands.executeCommand<JavaSourceLocationResponse>(
+            'java.execute.workspaceCommand', 'qute/debug/resolveJavaSource', args
+        );
+        return result ?? null;
+    } catch (err) {
+        console.error("Failed to resolve Java source via JDT LS", err);
+        return null;
+    }
+}
+
 /**
  * Update trace level from current settings.
  */
@@ -106,9 +164,9 @@ function traceReceivedNotification(message: any): void {
 
     let data: string | undefined = undefined;
     if (trace === Trace.Verbose) {
-        data =  message.body
-        ? `Params: ${stringifyTrace(message.body)}`
-        : 'No parameters provided.';
+        data = message.body
+            ? `Params: ${stringifyTrace(message.body)}`
+            : 'No parameters provided.';
     }
     showTrace(`Received notification '${message.event}'.`, data);
 }
@@ -172,7 +230,7 @@ function stringifyTrace(params: any): string | undefined {
 }
 
 function showTrace(message: string, data?: any | undefined): void {
-    outputChannel!.trace(getLogMessage(message, data));
+    outputChannel!.info(getLogMessage(message, data));
 }
 
 function showError(message: string): void {