Handlers for Smart Connector UIExtension

examples/workflow-server/src/common/provider/workflow-smart-connector-item-provider.ts

@@ -0,0 +1,58 @@
+/********************************************************************************
+ * Copyright (c) 2023 Business Informatics Group (TU Wien) and others.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License v. 2.0 which is available at
+ * http://www.eclipse.org/legal/epl-2.0.
+ *
+ * This Source Code may also be made available under the following Secondary
+ * Licenses when the conditions for such availability set forth in the Eclipse
+ * Public License v. 2.0 are satisfied: GNU General Public License, version 2
+ * with the GNU Classpath Exception which is available at
+ * https://www.gnu.org/software/classpath/license.html.
+ *
+ * SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
+ ********************************************************************************/
+import {
+    DefaultSmartConnectorItemProvider, SmartConnectorSettings
+} from '@eclipse-glsp/server';
+import {
+    SmartConnectorPosition,
+    SmartConnectorGroupUIType,
+    DefaultTypes
+} from '@eclipse-glsp/protocol';
+import { injectable } from 'inversify';
+import { ModelTypes } from '../util/model-types';
+
+@injectable()
+export class WorkflowSmartConnectorItemProvider extends DefaultSmartConnectorItemProvider {
+
+    protected override smartConnectorNodeSettings: SmartConnectorSettings = {
+        position: SmartConnectorPosition.Top,
+        showTitle: true,
+        submenu: false,
+        showOnlyForChildren: SmartConnectorGroupUIType.Labels
+    };
+
+    protected override smartConnectorEdgeSettings: SmartConnectorSettings = {
+        position: SmartConnectorPosition.Right,
+        showTitle: true,
+        submenu: true
+    };
+
+    protected override nodeOperationFilter = {
+        [ModelTypes.AUTOMATED_TASK]: [ModelTypes.WEIGHTED_EDGE, ModelTypes.AUTOMATED_TASK, ModelTypes.MANUAL_TASK,
+            ModelTypes.ACTIVITY_NODE],
+        [ModelTypes.MERGE_NODE]: [DefaultTypes.EDGE, ModelTypes.MERGE_NODE, ModelTypes.CATEGORY],
+        [ModelTypes.FORK_NODE]: [DefaultTypes.EDGE, ModelTypes.FORK_NODE],
+        [ModelTypes.CATEGORY]: [ModelTypes.WEIGHTED_EDGE, ModelTypes.FORK_NODE],
+        [ModelTypes.JOIN_NODE]: [ModelTypes.AUTOMATED_TASK, ModelTypes.FORK_NODE, ModelTypes.JOIN_NODE]
+    };
+
+    protected override defaultEdge = DefaultTypes.EDGE;
+
+    protected override edgeTypes = {
+        [ModelTypes.AUTOMATED_TASK]: DefaultTypes.EDGE,
+        [ModelTypes.MERGE_NODE]: DefaultTypes.EDGE
+    };
+}

examples/workflow-server/src/common/workflow-diagram-module.ts

@@ -32,7 +32,8 @@ import {
     OperationHandlerConstructor,
     PopupModelFactory,
     ServerModule,
-    SourceModelStorage
+    SourceModelStorage,
+    SmartConnectorItemProvider
 } from '@eclipse-glsp/server';
 import { injectable } from 'inversify';
 import { CreateAutomatedTaskHandler } from './handler/create-automated-task-handler';
@@ -52,6 +53,7 @@ import { NodeDocumentationNavigationTargetProvider } from './provider/node-docum
 import { PreviousNodeNavigationTargetProvider } from './provider/previous-node-navigation-target-provider';
 import { WorkflowCommandPaletteActionProvider } from './provider/workflow-command-palette-action-provider';
 import { WorkflowContextMenuItemProvider } from './provider/workflow-context-menu-item-provider';
+import { WorkflowSmartConnectorItemProvider } from './provider/workflow-smart-connector-item-provider';
 import { EditTaskOperationHandler } from './taskedit/edit-task-operation-handler';
 import { TaskEditContextActionProvider } from './taskedit/task-edit-context-provider';
 import { TaskEditValidator } from './taskedit/task-edit-validator';
@@ -107,6 +109,10 @@ export class WorkflowDiagramModule extends GModelDiagramModule {
         return WorkflowCommandPaletteActionProvider;
     }
 
+    protected override bindSmartConnectorItemProvider(): BindingTarget<SmartConnectorItemProvider> | undefined {
+        return WorkflowSmartConnectorItemProvider;
+    }
+
     protected override bindLabelEditValidator(): BindingTarget<LabelEditValidator> | undefined {
         return WorkflowLabelEditValidator;
     }

packages/server/src/common/di/diagram-module.ts

@@ -77,6 +77,8 @@ import {
     NavigationTargetProviders,
     Operations
 } from './service-identifiers';
+import { DefaultSmartConnectorItemProvider, SmartConnectorItemProvider } from '../features/contextactions/smart-connector-item-provider';
+import { OpenSmartConnectorActionHandler } from '../features/contextactions/smart-connector-action-handler';
 
 /**
  * The diagram module is the central configuration artifact for configuring a client session specific injector. For each
@@ -154,6 +156,7 @@ export abstract class DiagramModule extends GLSPModule {
         applyOptionalBindingTarget(context, ToolPaletteItemProvider, this.bindToolPaletteItemProvider());
         applyOptionalBindingTarget(context, CommandPaletteActionProvider, this.bindCommandPaletteActionProvider());
         applyOptionalBindingTarget(context, ContextMenuItemProvider, this.bindContextMenuItemProvider());
+        applyOptionalBindingTarget(context, SmartConnectorItemProvider, this.bindSmartConnectorItemProvider());
         this.configureMultiBinding(new MultiBinding<ContextActionsProvider>(ContextActionsProviders), binding =>
             this.configureContextActionProviders(binding)
         );
@@ -216,6 +219,7 @@ export abstract class DiagramModule extends GLSPModule {
         binding.add(SaveModelActionHandler);
         binding.add(UndoRedoActionHandler);
         binding.add(ComputedBoundsActionHandler);
+        binding.add(OpenSmartConnectorActionHandler);
     }
 
     protected bindDiagramType(): BindingTarget<string> {
@@ -345,6 +349,10 @@ export abstract class DiagramModule extends GLSPModule {
         return DefaultToolPaletteItemProvider;
     }
 
+    protected bindSmartConnectorItemProvider(): BindingTarget<SmartConnectorItemProvider> | undefined {
+        return DefaultSmartConnectorItemProvider;
+    }
+
     protected bindCommandPaletteActionProvider(): BindingTarget<CommandPaletteActionProvider> | undefined {
         return undefined;
     }

packages/server/src/common/features/contextactions/context-actions-provider-registry.ts

@@ -20,6 +20,7 @@ import { CommandPaletteActionProvider } from './command-palette-action-provider'
 import { ContextActionsProvider } from './context-actions-provider';
 import { ContextMenuItemProvider } from './context-menu-item-provider';
 import { ToolPaletteItemProvider } from './tool-palette-item-provider';
+import { SmartConnectorItemProvider } from './smart-connector-item-provider';
 
 /**
  * A registry that keeps track of all registered {@link ContextActionsProvider}s.
@@ -30,7 +31,8 @@ export class ContextActionsProviderRegistry extends Registry<string, ContextActi
         @multiInject(ContextActionsProviders) @optional() contextActionsProvider: ContextActionsProvider[] = [],
         @inject(ContextMenuItemProvider) @optional() contextMenuItemProvider?: ContextMenuItemProvider,
         @inject(CommandPaletteActionProvider) @optional() commandPaletteActionProvider?: CommandPaletteActionProvider,
-        @inject(ToolPaletteItemProvider) @optional() toolPaletteItemProvider?: ToolPaletteItemProvider
+        @inject(ToolPaletteItemProvider) @optional() toolPaletteItemProvider?: ToolPaletteItemProvider,
+        @inject(SmartConnectorItemProvider) @optional() smartConnectorItemProvider?: SmartConnectorItemProvider
     ) {
         super();
         contextActionsProvider.forEach(provider => this.register(provider.contextId, provider));
@@ -43,5 +45,8 @@ export class ContextActionsProviderRegistry extends Registry<string, ContextActi
         if (toolPaletteItemProvider) {
             this.register(toolPaletteItemProvider.contextId, toolPaletteItemProvider);
         }
+        if (smartConnectorItemProvider) {
+            this.register(smartConnectorItemProvider.contextId, smartConnectorItemProvider);
+        }
     }
 }

packages/server/src/common/features/contextactions/smart-connector-action-handler.ts

@@ -0,0 +1,40 @@
+/********************************************************************************
+ * Copyright (c) 2023 Business Informatics Group (TU Wien) and others.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License v. 2.0 which is available at
+ * http://www.eclipse.org/legal/epl-2.0.
+ *
+ * This Source Code may also be made available under the following Secondary
+ * Licenses when the conditions for such availability set forth in the Eclipse
+ * Public License v. 2.0 are satisfied: GNU General Public License, version 2
+ * with the GNU Classpath Exception which is available at
+ * https://www.gnu.org/software/classpath/license.html.
+ *
+ * SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
+ ********************************************************************************/
+import { Action, CloseSmartConnectorAction, OpenSmartConnectorAction, SelectAction, MaybePromise } from '@eclipse-glsp/protocol';
+import { inject, injectable } from 'inversify';
+import { ActionHandler } from '../../actions/action-handler';
+import { ModelState } from '../model/model-state';
+import { GNode } from '@eclipse-glsp/graph';
+
+@injectable()
+export class OpenSmartConnectorActionHandler implements ActionHandler {
+    actionKinds = [SelectAction.KIND];
+
+    @inject(ModelState)
+    protected modelState: ModelState;
+
+    execute(action: Action): MaybePromise<Action[]> {
+        if (SelectAction.is(action)) {
+            const selectedElement = this.modelState.index.find(action.selectedElementsIDs[0]);
+            if (selectedElement && selectedElement instanceof GNode) {
+                return [OpenSmartConnectorAction.create(action.selectedElementsIDs[0])];
+            } else {
+                return [];
+            }
+        }
+        return [CloseSmartConnectorAction.create()];
+    }
+}

packages/server/src/common/features/contextactions/smart-connector-item-provider.ts

@@ -0,0 +1,206 @@
+/********************************************************************************
+ * Copyright (c) 2023 Business Informatics Group (TU Wien) and others.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License v. 2.0 which is available at
+ * http://www.eclipse.org/legal/epl-2.0.
+ *
+ * This Source Code may also be made available under the following Secondary
+ * Licenses when the conditions for such availability set forth in the Eclipse
+ * Public License v. 2.0 are satisfied: GNU General Public License, version 2
+ * with the GNU Classpath Exception which is available at
+ * https://www.gnu.org/software/classpath/license.html.
+ *
+ * SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
+ ********************************************************************************/
+import {
+    Args,
+    CreateEdgeOperation,
+    CreateNodeOperation,
+    PaletteItem,
+    SmartConnectorGroupItem,
+    EditorContext,
+    LabeledAction,
+    MaybePromise,
+    SmartConnectorPosition,
+    SmartConnectorGroupUIType,
+    SmartConnectorNodeItem,
+    TriggerNodeCreationAction
+} from '@eclipse-glsp/protocol';
+import { inject, injectable } from 'inversify';
+import { CreateOperationHandler } from '../../operations/create-operation-handler';
+import { OperationHandlerRegistry } from '../../operations/operation-handler-registry';
+import { ContextActionsProvider } from './context-actions-provider';
+import { Logger } from '../../utils/logger';
+
+/**
+ * A {@link ContextActionsProvider} for {@link PaletteItem}s in the Smart Connector which appears when a node is selected.
+ */
+@injectable()
+export abstract class SmartConnectorItemProvider implements ContextActionsProvider {
+    /**
+     * Returns the context id of the provider.
+     */
+    get contextId(): string {
+        return 'smart-connector';
+    }
+
+    /**
+     * Returns a list of {@link LabeledAction}s for a given {@link EditorContext}.
+     *
+     * @param editorContext The editorContext for which the actions are returned.
+     * @returns A list of {@link LabeledAction}s for a given {@link EditorContext}.
+     */
+    async getActions(editorContext: EditorContext): Promise<LabeledAction[]> {
+        return this.getItems(editorContext.args);
+    }
+
+    /**
+     * Constructs a list of {@link PaletteItem}s for a given map of string arguments.
+     *
+     * @param args A map of string arguments.
+     * @returns A list of {@link PaletteItem}s for a given map of string arguments.
+     */
+    abstract getItems(args?: Args): MaybePromise<SmartConnectorGroupItem[]>;
+}
+
+export type SmartConnectorSettings =
+    | {
+          position: SmartConnectorPosition;
+          showTitle: true;
+          submenu: boolean;
+          showOnlyForChildren?: SmartConnectorGroupUIType;
+      }
+    | {
+          position: SmartConnectorPosition;
+          showTitle: false;
+          showOnlyForChildren?: SmartConnectorGroupUIType;
+      };
+
+@injectable()
+export class DefaultSmartConnectorItemProvider extends SmartConnectorItemProvider {
+    @inject(OperationHandlerRegistry) protected operationHandlerRegistry: OperationHandlerRegistry;
+    @inject(Logger)
+    protected logger: Logger;
+
+    protected counter: number;
+
+    protected smartConnectorNodeSettings: SmartConnectorSettings = {
+        position: SmartConnectorPosition.Right,
+        showTitle: true,
+        submenu: true,
+        showOnlyForChildren: SmartConnectorGroupUIType.Icons
+    };
+
+    protected smartConnectorEdgeSettings: SmartConnectorSettings = {
+        position: SmartConnectorPosition.Right,
+        showTitle: true,
+        submenu: false
+    };
+    /** filter that excludes nodes/edges from options, given a node ID as key */
+    protected nodeOperationFilter: Record<string, string[] | undefined> = {};
+
+    /** edge that is used between source and destination by default when a new node is created
+     *  (if not given, no edge will be created when creating new node) */
+    protected defaultEdge?: string;
+
+    /** list of edges where the key is a node ID and the value is a edge ID
+     *  the edge to a new node when the source node has the ID of the key
+     *  otherwise, the default edge will be used */
+    protected edgeTypes: Record<string, string | undefined>;
+
+    getItems(args?: Args): SmartConnectorGroupItem[] {
+        const handlers = this.operationHandlerRegistry.getAll().filter(CreateOperationHandler.is) as CreateOperationHandler[];
+        this.counter = 0;
+        const nodes = this.createSmartConnectorGroupItem(
+            handlers,
+            CreateNodeOperation.KIND,
+            args?.nodeType as string,
+            this.smartConnectorNodeSettings.showOnlyForChildren
+        );
+        const edges = this.createSmartConnectorGroupItem(
+            handlers,
+            CreateEdgeOperation.KIND,
+            args?.nodeType as string,
+            this.smartConnectorEdgeSettings.showOnlyForChildren
+        );
+        return [
+            {
+                id: 'smart-connector-node-group',
+                label: 'Nodes',
+                actions: [],
+                children: nodes,
+                icon: 'symbol-property',
+                sortString: 'A',
+                ...this.smartConnectorNodeSettings
+            },
+            {
+                id: 'smart-connector-edge-group',
+                label: 'Edges',
+                actions: [],
+                children: edges,
+                icon: 'symbol-property',
+                sortString: 'B',
+                ...this.smartConnectorEdgeSettings
+            }
+        ];
+    }
+
+    protected createSmartConnectorGroupItem(
+        handlers: CreateOperationHandler[],
+        kind: string,
+        selectedNodeType: string,
+        showOnly?: SmartConnectorGroupUIType
+    ): PaletteItem[] {
+        const includedInNodeFilter = (e: string): boolean => !!this.nodeOperationFilter[selectedNodeType]?.includes(e);
+        const paletteItems = handlers
+            .filter(
+                handler =>
+                    handler.operationType === kind &&
+                    (selectedNodeType && this.nodeOperationFilter[selectedNodeType]
+                        ? !handler.elementTypeIds.some(includedInNodeFilter)
+                        : true)
+            )
+            .map(handler =>
+                handler.getTriggerActions().map(action => this.createSmartConnectorItems(action, handler.label, selectedNodeType))
+            )
+            .reduce((accumulator, value) => accumulator.concat(value), [])
+            .sort((a, b) => a.sortString.localeCompare(b.sortString));
+        if (showOnly === SmartConnectorGroupUIType.Icons) {
+            if (paletteItems.every(paletteItem => paletteItem.icon !== '')) {
+                this.logger.warn('Not all elements have icons. Labels will be shown, check settings for smart connector.');
+                return paletteItems;
+            }
+            paletteItems.forEach(paletteItem => (paletteItem.label = ''));
+        } else if (showOnly === SmartConnectorGroupUIType.Labels) {
+            paletteItems.forEach(paletteItem => (paletteItem.icon = ''));
+        }
+        return paletteItems;
+    }
+
+    protected createSmartConnectorItems(
+        action: PaletteItem.TriggerElementCreationAction,
+        label: string,
+        nodeType: string
+    ): PaletteItem | SmartConnectorNodeItem {
+        if (TriggerNodeCreationAction.is(action)) {
+            let edgeType = this.edgeTypes[nodeType];
+            if (!edgeType) {
+                edgeType = this.defaultEdge;
+            }
+            return {
+                id: `smart-connector-palette-item${this.counter++}`,
+                sortString: label.charAt(0),
+                label,
+                actions: [action],
+                edgeType: edgeType
+            };
+        }
+        return {
+            id: `smart-connector-palette-item${this.counter++}`,
+            sortString: label.charAt(0),
+            label,
+            actions: [action]
+        };
+    }
+}