B: Tentative fix for longpress on iOS

rsconcept/frontend/src/features/oss/pages/oss-page/editor-oss-graph/context-menu/use-context-menu.ts

@@ -19,18 +19,13 @@ export function useContextMenu() {
   const setHoverOperation = useOperationTooltipStore(state => state.setHoverItem);
   const { addSelectedNodes } = useStoreApi().getState();
 
-  function handleContextMenu(event: React.MouseEvent<Element>, node: OssNode) {
-    event.preventDefault();
-    event.stopPropagation();
-
+  function openContextMenu(node: OssNode, clientX: number, clientY: number) {
     addSelectedNodes([node.id]);
-
     setMenuProps({
       item: node.type === 'block' ? node.data.block ?? null : node.data.operation ?? null,
-      cursorX: event.clientX,
-      cursorY: event.clientY
+      cursorX: clientX,
+      cursorY: clientY
     });
-
     setIsOpen(true);
     setHoverOperation(null);
   }
@@ -42,7 +37,7 @@ export function useContextMenu() {
   return {
     isOpen,
     menuProps,
-    handleContextMenu,
+    openContextMenu,
     hideContextMenu
   };
 }

rsconcept/frontend/src/features/oss/pages/oss-page/editor-oss-graph/oss-flow.tsx

@@ -1,6 +1,6 @@
 'use client';
 
-import { useState } from 'react';
+import { useRef, useState } from 'react';
 import clsx from 'clsx';
 
 import { DiagramFlow, useReactFlow, useStoreApi } from '@/components/flow/diagram-flow';
@@ -8,6 +8,7 @@ import { useMainHeight } from '@/stores/app-layout';
 import { useDialogsStore } from '@/stores/dialogs';
 import { PARAMETER } from '@/utils/constants';
 import { promptText } from '@/utils/labels';
+import { isIOS } from '@/utils/utils';
 
 import { useDeleteBlock } from '../../../backend/use-delete-block';
 import { useMutatingOss } from '../../../backend/use-mutating-oss';
@@ -24,7 +25,7 @@ import { OssNodeTypes } from './graph/oss-node-types';
 import { CoordinateDisplay } from './coordinate-display';
 import { useOssFlow } from './oss-flow-context';
 import { ToolbarOssGraph } from './toolbar-oss-graph';
-import { useDragging } from './use-dragging';
+// import { useDragging } from './use-dragging';
 import { useGetLayout } from './use-get-layout';
 
 export const flowOptions = {
@@ -64,8 +65,11 @@ export function OssFlow() {
   const showDeleteOperation = useDialogsStore(state => state.showDeleteOperation);
   const showEditBlock = useDialogsStore(state => state.showEditBlock);
 
-  const { isOpen: isContextMenuOpen, menuProps, handleContextMenu, hideContextMenu } = useContextMenu();
-  const { handleDragStart, handleDrag, handleDragStop } = useDragging({ hideContextMenu });
+  const { isOpen: isContextMenuOpen, menuProps, openContextMenu, hideContextMenu } = useContextMenu();
+  // const { handleDragStart, handleDrag, handleDragStop } = useDragging({ hideContextMenu });
+
+  const longPressTimeout = useRef<NodeJS.Timeout | null>(null);
+  const longPressTarget = useRef<EventTarget | null>(null);
 
   function handleSavePositions() {
     void updateLayout({ itemID: schema.id, data: getLayout() });
@@ -123,6 +127,7 @@ export function OssFlow() {
   }
 
   function handleNodeDoubleClick(event: React.MouseEvent<Element>, node: OssNode) {
+    console.log('handleNodeDoubleClick', event, node);
     event.preventDefault();
     event.stopPropagation();
 
@@ -183,6 +188,56 @@ export function OssFlow() {
     setMouseCoords(targetPosition);
   }
 
+  function handleNodeContextMenu(event: React.MouseEvent<Element>, node: OssNode) {
+    event.preventDefault();
+    event.stopPropagation();
+    openContextMenu(node, event.clientX, event.clientY);
+  }
+
+  function handleTouchStart(event: React.TouchEvent) {
+    console.log('handleTouchStart', event);
+    if (!isIOS() || event.touches.length !== 1) {
+      return;
+    }
+
+    // Long-press support for iOS/iPadOS
+    const touch = event.touches[0];
+    longPressTarget.current = touch.target;
+    longPressTimeout.current = setTimeout(() => {
+      let targetID = null;
+      let element = touch.target as HTMLElement | null;
+      while (element) {
+        if (element?.getAttribute?.('data-id')) {
+          targetID = element.getAttribute('data-id');
+          break;
+        }
+        element = element.parentElement;
+      }
+      if (targetID) {
+        const targetNode = nodes.find(node => node.id === targetID);
+        if (targetNode) {
+          openContextMenu(targetNode, touch.clientX, touch.clientY);
+        }
+      }
+    }, PARAMETER.ossContextMenuDuration);
+  }
+
+  function handleTouchEnd() {
+    if (!isIOS()) return;
+    if (longPressTimeout.current) {
+      clearTimeout(longPressTimeout.current);
+      longPressTimeout.current = null;
+    }
+  }
+
+  function handleTouchMove() {
+    if (!isIOS()) return;
+    if (longPressTimeout.current) {
+      clearTimeout(longPressTimeout.current);
+      longPressTimeout.current = null;
+    }
+  }
+
   return (
     <div tabIndex={-1} className='relative' onMouseMove={showCoordinates ? handleMouseMove : undefined}>
       {showCoordinates ? <CoordinateDisplay mouseCoords={mouseCoords} className='absolute top-1 right-2' /> : null}
@@ -209,16 +264,20 @@ export function OssFlow() {
         showGrid={showGrid}
         onClick={hideContextMenu}
         onNodeDoubleClick={handleNodeDoubleClick}
-        onNodeContextMenu={handleContextMenu}
+        onNodeContextMenu={handleNodeContextMenu}
         onContextMenu={hideContextMenu}
-        onNodeDragStart={handleDragStart}
-        onNodeDrag={handleDrag}
-        onNodeDragStop={handleDragStop}
+        onTouchStart={handleTouchStart}
+        onTouchEnd={handleTouchEnd}
+        onTouchMove={handleTouchMove}
       />
     </div>
   );
 }
 
+// onNodeDragStart={handleDragStart}
+// onNodeDrag={handleDrag}
+// onNodeDragStop={handleDragStop}
+
 // -------- Internals --------
 function extractBlockParent(selectedItems: IOssItem[]): number | null {
   if (selectedItems.length === 1 && selectedItems[0].nodeType === NodeType.BLOCK) {

rsconcept/frontend/src/features/oss/pages/oss-page/editor-oss-graph/use-dragging.tsx

@@ -42,6 +42,7 @@ export function useDragging({ hideContextMenu }: DraggingProps) {
   }
 
   function handleDragStart(event: React.MouseEvent, target: Node) {
+    console.log('handleDragStart', event);
     if (event.shiftKey) {
       setContainMovement(true);
       applyContainMovement([target.id, ...selected], true);

rsconcept/frontend/src/utils/constants.ts

@@ -11,6 +11,7 @@ export const PARAMETER = {
   notificationDelay: 300, // milliseconds delay for notifications
   zoomDuration: 500, // milliseconds animation duration
   navigationPopupDelay: 300, // milliseconds delay for navigation popup
+  ossContextMenuDuration: 500, // milliseconds - duration of long-press to trigger context menu on iOS/iPadOS
 
   moveDuration: 500, // milliseconds - duration of move animation
 

rsconcept/frontend/src/utils/utils.ts

@@ -192,3 +192,16 @@ export function removeTags(target?: string): string {
 export function prepareTooltip(text: string, hotkey?: string) {
   return hotkey ? `<kbd>[${hotkey}]</kbd><br/>${text}` : text;
 }
+
+/**
+ * Utility to detect iOS/iPadOS.
+ */
+export function isIOS() {
+  if (typeof navigator === 'undefined') {
+    return false;
+  }
+  return (
+    /iPad|iPhone|iPod/.test(navigator.userAgent) ||
+    (navigator.userAgent.includes('Macintosh') && 'ontouchend' in document)
+  );
+}