From 0f9736eeeb3475245ef0e10d7d4208d0ee1feab5 Mon Sep 17 00:00:00 2001
From: Martin Fleck <mfleck@eclipsesource.com>
Date: Fri, 16 Jan 2026 20:12:05 +0100
Subject: [PATCH 1/2] Extend model submission with optional layout information

Fixes https://github.com/eclipse-glsp/glsp/issues/1616
---
 .../features/layout/computed-bounds-action-handler.ts |  7 +++++--
 .../common/features/model/model-submission-handler.ts | 11 +++++++----
 2 files changed, 12 insertions(+), 6 deletions(-)

diff --git a/packages/server/src/common/features/layout/computed-bounds-action-handler.ts b/packages/server/src/common/features/layout/computed-bounds-action-handler.ts
index 5bf5458..c5a5a92 100644
--- a/packages/server/src/common/features/layout/computed-bounds-action-handler.ts
+++ b/packages/server/src/common/features/layout/computed-bounds-action-handler.ts
@@ -14,7 +14,7 @@
  * SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
  ********************************************************************************/
 import { GModelRoot } from '@eclipse-glsp/graph';
-import { Action, ComputedBoundsAction, MaybePromise } from '@eclipse-glsp/protocol';
+import { Action, ComputedBoundsAction, LayoutOperation, MaybePromise } from '@eclipse-glsp/protocol';
 import { inject, injectable } from 'inversify';
 import { ActionHandler } from '../../actions/action-handler';
 import { applyAlignment, applyElementAndBounds, applyRoute } from '../../utils/layout-util';
@@ -39,7 +39,10 @@ export class ComputedBoundsActionHandler implements ActionHandler {
         const model = this.modelState.root;
         if (action.revision === model.revision) {
             this.applyBounds(model, action);
-            return this.submissionHandler.submitModelDirectly();
+            return this.submissionHandler.submitModelDirectly(
+                undefined,
+                LayoutOperation.create([], { canvasBounds: action.canvasBounds, viewport: action.viewport })
+            );
         }
 
         return [];
diff --git a/packages/server/src/common/features/model/model-submission-handler.ts b/packages/server/src/common/features/model/model-submission-handler.ts
index 78b11c1..997efaa 100644
--- a/packages/server/src/common/features/model/model-submission-handler.ts
+++ b/packages/server/src/common/features/model/model-submission-handler.ts
@@ -17,6 +17,7 @@ import {
     Action,
     DirtyStateChangeReason,
     GModelRootSchema,
+    LayoutOperation,
     MarkersReason,
     MaybePromise,
     RequestBoundsAction,
@@ -112,9 +113,10 @@ export class ModelSubmissionHandler {
      * to the `ActionDispatcher`, or simply returned as the result of an `ActionHandler.execute()` method.
      *
      * @param reason The optional reason that caused the model update.
+     * @param layout The optional layout operation that carries the information for auto-layout.
      * @returns A list of actions to be processed in order to submit the model.
      */
-    submitModel(reason?: DirtyStateChangeReason): MaybePromise<Action[]> {
+    submitModel(reason?: DirtyStateChangeReason, layout?: LayoutOperation): MaybePromise<Action[]> {
         this.modelFactory.createModel();
 
         const revision = this.requestModelAction ? 0 : this.modelState.root.revision! + 1;
@@ -124,7 +126,7 @@ export class ModelSubmissionHandler {
             const root = this.serializeGModel();
             return [RequestBoundsAction.create(root), SetDirtyStateAction.create(this.commandStack.isDirty, { reason })];
         }
-        return this.submitModelDirectly(reason);
+        return this.submitModelDirectly(reason, layout);
     }
 
     /**
@@ -139,11 +141,12 @@ export class ModelSubmissionHandler {
      * `ActionHandler.execute()` method.
      *
      * @param reason The optional reason that caused the model update.
+     * @param layout The optional layout operation that carries the information for auto-layout.
      * @returns A list of actions to be processed in order to submit the model.
      */
-    async submitModelDirectly(reason?: DirtyStateChangeReason): Promise<Action[]> {
+    async submitModelDirectly(reason?: DirtyStateChangeReason, layout?: LayoutOperation): Promise<Action[]> {
         if (this.diagramConfiguration.layoutKind === ServerLayoutKind.AUTOMATIC && this.layoutEngine) {
-            await this.layoutEngine.layout();
+            await this.layoutEngine.layout(layout);
         }
 
         const root = this.serializeGModel();

From 72ffc285f868924057a009041df0fc794c8eea07 Mon Sep 17 00:00:00 2001
From: Tobias Ortmayr <tortmayr@eclipsesource.com>
Date: Tue, 20 Jan 2026 08:59:06 +0100
Subject: [PATCH 2/2] Upgrade next

---
 yarn.lock | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/yarn.lock b/yarn.lock
index 2b99491..0a65eb6 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -301,9 +301,9 @@
     prettier-plugin-packagejson "~2.4.6"
 
 "@eclipse-glsp/protocol@next":
-  version "2.6.0-next.6"
-  resolved "https://registry.yarnpkg.com/@eclipse-glsp/protocol/-/protocol-2.6.0-next.6.tgz#7437694ed1e4f5ca716ba657b98af46c90abbc9a"
-  integrity sha512-uswJrgPNb7wwRCiqyoNOkTCqdM2S+3avXuh4/vDKxyo7w05yLkblp1foEInfYIbRmqTod05K4fAtUWEkxJcg5Q==
+  version "2.6.0-next.14"
+  resolved "https://registry.yarnpkg.com/@eclipse-glsp/protocol/-/protocol-2.6.0-next.14.tgz#954c845feaca1484a76fc53617290bfa58ff36b9"
+  integrity sha512-081j0/WZrUFe7/G+T2zxKRDBj0grlJ/r5pizYPP8ig7Lzq9hRqL2n1vxOoU9DUaeZcWec6MJJRm5nscomFq7IA==
   dependencies:
     sprotty-protocol "1.4.0"
     uuid "~10.0.0"