feat: manually mirror opencoze's code from bytedance

Change-Id: I09a73aadda978ad9511264a756b2ce51f5761adf

frontend/packages/workflow/fabric-canvas/src/context/global.tsx

@@ -0,0 +1,36 @@
+/*
+ * Copyright 2025 coze-dev Authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+ 
+import { createContext, useContext } from 'react';
+
+import { type FabricObject } from 'fabric';
+import { type InputVariable } from '@coze-workflow/base';
+
+import { type IRefPosition, type VariableRef } from '../typings';
+
+export const GlobalContext = createContext<{
+  variables?: InputVariable[];
+  customVariableRefs?: VariableRef[];
+  allObjectsPositionInScreen?: IRefPosition[];
+  activeObjects?: FabricObject[];
+  addRefObjectByVariable?: (variable: InputVariable) => void;
+  updateRefByObjectId?: (data: {
+    objectId: string;
+    variable?: InputVariable;
+  }) => void;
+}>({});
+
+export const useGlobalContext = () => useContext(GlobalContext);

frontend/packages/workflow/fabric-canvas/src/context/index.tsx

@@ -0,0 +1,17 @@
+/*
+ * Copyright 2025 coze-dev Authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+ 
+export { GlobalContext, useGlobalContext } from './global';