Ensure that recording commands can be executed asychronous (#40)

Change signature of `applyPatch` and `getJsonObject` to allso allow promise return values
Also: add missing exports to main index

packages/server/src/common/command/recording-command.ts

@@ -29,9 +29,9 @@ export abstract class AbstractRecordingCommand<JsonObject extends AnyObject> imp
     protected redoPatch?: jsonPatch.Operation[];
 
     async execute(): Promise<void> {
-        const beforeState = this.deepClone(this.getJsonObject());
+        const beforeState = this.deepClone(await this.getJsonObject());
         await this.doExecute();
-        const afterState = this.getJsonObject();
+        const afterState = await this.getJsonObject();
         this.undoPatch = jsonPatch.compare(afterState, beforeState);
         this.redoPatch = jsonPatch.compare(beforeState, afterState);
     }
@@ -41,14 +41,14 @@ export abstract class AbstractRecordingCommand<JsonObject extends AnyObject> imp
      * right after {@link AbstractRecordingCommand.doExecute} to derive the undo & redo patches.
      * @returns The current state of the JSON object
      */
-    protected abstract getJsonObject(): JsonObject;
+    protected abstract getJsonObject(): MaybePromise<JsonObject>;
 
     /**
      * The actual execution i.e. series of changes applied to the JSOn object that should be captured.
      */
     protected abstract doExecute(): MaybePromise<void>;
 
-    protected applyPatch(object: JsonObject, patch: jsonPatch.Operation[]): void {
+    protected applyPatch(object: JsonObject, patch: jsonPatch.Operation[]): MaybePromise<void> {
         jsonPatch.applyPatch(object, patch, false, true);
     }
 
@@ -62,15 +62,15 @@ export abstract class AbstractRecordingCommand<JsonObject extends AnyObject> imp
         return jsonPatch.deepClone(object);
     }
 
-    undo(): void {
+    async undo(): Promise<void> {
         if (this.undoPatch) {
-            this.applyPatch(this.getJsonObject(), this.undoPatch);
+            return this.applyPatch(await this.getJsonObject(), this.undoPatch);
         }
     }
 
-    redo(): void {
+    async redo(): Promise<void> {
         if (this.redoPatch) {
-            this.applyPatch(this.getJsonObject(), this.redoPatch);
+            return this.applyPatch(await this.getJsonObject(), this.redoPatch);
         }
     }
 
@@ -88,7 +88,7 @@ export class RecordingCommand<JsonObject extends AnyObject = AnyObject> extends
         super();
     }
 
-    protected getJsonObject(): JsonObject {
+    protected getJsonObject(): MaybePromise<JsonObject> {
         return this.jsonObject;
     }
 }
@@ -107,11 +107,11 @@ export class GModelRecordingCommand extends AbstractRecordingCommand<GModelRootS
         this.modelState.index.indexRoot(this.modelState.root);
     }
 
-    protected getJsonObject(): GModelRootSchema {
+    protected getJsonObject(): MaybePromise<GModelRootSchema> {
         return this.serializer.createSchema(this.modelState.root);
     }
 
-    protected override applyPatch(rootSchema: GModelRootSchema, patch: jsonPatch.Operation[]): void {
+    protected override applyPatch(rootSchema: GModelRootSchema, patch: jsonPatch.Operation[]): MaybePromise<void> {
         super.applyPatch(rootSchema, patch);
         const newRoot = this.serializer.createRoot(rootSchema);
         this.modelState.updateRoot(newRoot);

packages/server/src/common/features/layout/computed-bounds-action-handler.ts

@@ -17,7 +17,7 @@ import { GModelRoot } from '@eclipse-glsp/graph';
 import { Action, ComputedBoundsAction, MaybePromise } from '@eclipse-glsp/protocol';
 import { inject, injectable } from 'inversify';
 import { ActionHandler } from '../../actions/action-handler';
-import { applyAlignment, applyBounds, applyRoute } from '../../utils/layout-util';
+import { applyAlignment, applyElementAndBounds, applyRoute } from '../../utils/layout-util';
 import { ModelState } from '../model/model-state';
 import { ModelSubmissionHandler } from '../model/model-submission-handler';
 
@@ -47,7 +47,7 @@ export class ComputedBoundsActionHandler implements ActionHandler {
 
     protected applyBounds(root: GModelRoot, action: ComputedBoundsAction): void {
         const index = this.modelState.index;
-        action.bounds.forEach(bounds => applyBounds(bounds, index));
+        action.bounds.forEach(bounds => applyElementAndBounds(bounds, index));
         (action.alignments ?? []).forEach(alignment => applyAlignment(alignment, index));
         (action.routes ?? []).forEach(route => applyRoute(route, index));
     }

packages/server/src/common/index.ts

@@ -23,6 +23,8 @@ export * from './actions/client-action-handler';
 export * from './actions/global-action-provider';
 export * from './command/command';
 export * from './command/command-stack';
+export * from './command/recording-command';
+export * from './command/undo-redo-action-handler';
 export * from './di/binding-target';
 export * from './di/client-session-module';
 export * from './di/diagram-module';
@@ -65,7 +67,6 @@ export * from './features/popup/popup-model-factory';
 export * from './features/popup/request-popup-model-action-handler';
 export * from './features/validation/model-validator';
 export * from './features/validation/request-markers-handler';
-export * from './gmodel/cut-operation-handler';
 export * from './gmodel/index';
 export * from './launch/glsp-server-launcher';
 export * from './operations/compound-operation-handler';
@@ -84,6 +85,7 @@ export * from './session/client-session-manager';
 export * from './utils/args-util';
 export * from './utils/client-options-util';
 export * from './utils/glsp-server-error';
+export * from './utils/layout-util';
 export * from './utils/logger';
 export * from './utils/promise-queue';
 export * from './utils/registry';

packages/server/src/common/utils/layout-util.ts

@@ -27,7 +27,7 @@ import { getOrThrow, GLSPServerError } from './glsp-server-error';
  * @param index  The model index.
  * @returns The changed element.
  */
-export function applyBounds(bounds: ElementAndBounds, index: GModelIndex): GBoundsAware | undefined {
+export function applyElementAndBounds(bounds: ElementAndBounds, index: GModelIndex): GBoundsAware | undefined {
     const element = getOrThrow(index.get(bounds.elementId), 'Model element not found! ID: ' + bounds.elementId);
     if (isGBoundsAware(element)) {
         if (bounds.newPosition !== undefined) {