feat(onFocus): pan nodes into the viewport on tab

packages/react/src/components/NodeWrapper/index.tsx

@@ -155,6 +155,19 @@ export function NodeWrapper<NodeType extends Node>({
     }
   };
 
+  const onFocus = () => {
+    const { panZoom } = store.getState();
+    const zoom = panZoom?.getViewport().zoom ?? 1;
+    panZoom?.setViewport(
+      {
+        x: -(internals.positionAbsolute.x + nodeDimensions.width / 2) * zoom + window.innerWidth / 2,
+        y: -(internals.positionAbsolute.y + nodeDimensions.height / 2) * zoom + window.innerHeight / 2,
+        zoom: zoom,
+      },
+      { duration: 100 }
+    );
+  };
+
   return (
     <div
       className={cc([
@@ -192,6 +205,7 @@ export function NodeWrapper<NodeType extends Node>({
       onDoubleClick={onDoubleClickHandler}
       onKeyDown={isFocusable ? onKeyDown : undefined}
       tabIndex={isFocusable ? 0 : undefined}
+      onFocus={isFocusable ? onFocus : undefined}
       role={isFocusable ? 'button' : undefined}
       aria-describedby={disableKeyboardA11y ? undefined : `${ARIA_NODE_DESC_KEY}-${rfId}`}
       aria-label={node.ariaLabel}

packages/svelte/src/lib/components/NodeWrapper/NodeWrapper.svelte

@@ -196,6 +196,27 @@
       store.moveSelectedNodes(arrowKeyDiffs[event.key], event.shiftKey ? 4 : 1);
     }
   }
+
+  function onFocus() {
+    if (store.disableKeyboardA11y) {
+      return;
+    }
+    
+    const zoom = store.panZoom?.getViewport().zoom ?? 1;
+    
+    // Get node dimensions 
+    const nodeWidth = nodeRef?.offsetWidth || 0;
+    const nodeHeight = nodeRef?.offsetHeight || 0;
+    
+    store.panZoom?.setViewport(
+      {
+        x: -(positionX + nodeWidth / 2) * zoom + window.innerWidth / 2,
+        y: -(positionY + nodeHeight / 2) * zoom + window.innerHeight / 2,
+        zoom: zoom,
+      },
+      { duration: 100 }
+    );
+  }
 </script>
 
 {#if !hidden}
@@ -251,6 +272,7 @@
       ? (event) => onnodecontextmenu({ node: userNode, event })
       : undefined}
     onkeydown={focusable ? onKeyDown : undefined}
+    onfocus={focusable ? onFocus : undefined}
     tabIndex={focusable ? 0 : undefined}
     role={focusable ? 'button' : undefined}
     aria-describedby={store.disableKeyboardA11y