feat: implement diagram context menu and fix entity creation logic

Author: remonaadite009

packages/composite-editor/src/browser/composite-editor-open-handler.ts

@@ -19,6 +19,7 @@ import { CompositeEditor } from './composite-editor';
 export interface CompositeEditorOptions extends NavigatableWidgetOptions {
    selection?: RecursivePartial<Range>;
    fileType: Exclude<ModelFileType, 'Generic'>;
+   initialTab?: 'primary' | 'code';
 }
 
 @injectable()
@@ -54,7 +55,8 @@ export class CompositeEditorOpenHandler
       return {
          kind,
          uri,
-         fileType
+         fileType,
+         initialTab: (options as any)?.initialTab
       };
    }
 

packages/composite-editor/src/browser/composite-editor.ts

@@ -238,6 +238,12 @@ export class CompositeEditor
       this.addWidget(primaryWidget);
       this.addWidget(codeWidget);
 
+      if (this.options.initialTab === 'code') {
+         this.tabPanel.currentWidget = codeWidget;
+      } else {
+         this.tabPanel.currentWidget = primaryWidget;
+      }
+
       this.update();
       this.initialized.resolve();
    }
@@ -420,7 +426,7 @@ export class CompositeEditor
 
    storeState(): object | undefined {
       return {
-         primaryWidget: this.getPrimaryWidget()?.storeState(),
+      primaryWidget: this.getPrimaryWidget()?.storeState(),
          codeWidget: this.getCodeWidget()?.storeState()
       };
    }
@@ -430,4 +436,4 @@ export class CompositeEditor
       this.getPrimaryWidget()?.restoreState(oldState.primaryWidget);
       this.getCodeWidget()?.restoreState(oldState.codeWidget);
    }
-}
+}