Ant tree -> React complex tree

Summary:
Upgraded from ant tree library to the much more capable React complex tree. Added the following:
1. Ability to expand / collapse nodes while automatically expanding / collapsing active/inactive children when they change
2. Keyboard controls of tree all the time
3. Basic search functionality
4. Selecting node in tree focuses and scrolls in the tree
5. Hover state for tree

Reviewed By: lblasa

Differential Revision: D40633876

fbshipit-source-id: 8dcef5ec2c277e476a3eb3cdaef62b15c25323c0

desktop/plugins/public/ui-debugger/components/Tree.tsx

@@ -8,76 +8,108 @@
  */
 
 import {Id, UINode} from '../types';
-import {Tree as AntTree, TreeDataNode} from 'antd';
-import {DownOutlined} from '@ant-design/icons';
-import React from 'react';
+import React, {useEffect, useRef} from 'react';
+import {
+  Tree as ComplexTree,
+  ControlledTreeEnvironment,
+  TreeItem,
+} from 'react-complex-tree';
+
+import {plugin} from '../index';
+import {usePlugin, useValue} from 'flipper-plugin';
+import {
+  InteractionMode,
+  TreeEnvironmentRef,
+} from 'react-complex-tree/lib/esm/types';
 
 export function Tree(props: {
   rootId: Id;
   nodes: Map<Id, UINode>;
   selectedNode?: Id;
+  hoveredNode?: Id;
   onSelectNode: (id: Id) => void;
   onHoveredNode: (id?: Id) => void;
 }) {
-  const [antTree, inactive] = nodesToAntTree(props.rootId, props.nodes);
+  const instance = usePlugin(plugin);
+  const expandedItems = useValue(instance.treeState).expandedNodes;
+  const items = toComplexTree(props.nodes);
 
+  const treeRef = useRef<TreeEnvironmentRef>();
+  useEffect(() => {
+    //this makes the keyboard arrow  controls work always, even when using the visualiser
+    treeRef.current?.focusTree('tree', true);
+  }, [props.hoveredNode, props.selectedNode]);
   return (
-    <div
-      onMouseLeave={() => {
-        //This div exists so when mouse exits the entire tree then unhover
-        props.onHoveredNode(undefined);
-      }}>
-      <AntTree
-        showIcon
-        showLine
-        titleRender={(node) => {
-          return (
-            <div
-              onMouseEnter={() => {
-                props.onHoveredNode(node.key as Id);
-              }}>
-              {node.title}
-            </div>
+    <ControlledTreeEnvironment
+      ref={treeRef as any}
+      items={items}
+      getItemTitle={(item) => item.data.name}
+      canRename={false}
+      canDragAndDrop={false}
+      canSearch
+      autoFocus
+      viewState={{
+        tree: {
+          focusedItem: props.hoveredNode,
+          expandedItems,
+          selectedItems: props.selectedNode ? [props.selectedNode] : [],
+        },
+      }}
+      onFocusItem={(item) => props.onHoveredNode(item.index)}
+      onExpandItem={(item) => {
+        instance.treeState.update((draft) => {
+          draft.expandedNodes.push(item.index);
+        });
+      }}
+      onCollapseItem={(item) =>
+        instance.treeState.update((draft) => {
+          draft.expandedNodes = draft.expandedNodes.filter(
+            (expandedItemIndex) => expandedItemIndex !== item.index,
           );
-        }}
-        selectedKeys={[props.selectedNode ?? '']}
-        onSelect={(selected) => {
-          props.onSelectNode(selected[0] as Id);
-        }}
-        defaultExpandAll
-        expandedKeys={[...props.nodes.keys()].filter(
-          (key) => !inactive.includes(key),
-        )}
-        switcherIcon={<DownOutlined />}
-        treeData={[antTree]}
+        })
+      }
+      onSelectItems={(items) => props.onSelectNode(items[0])}
+      defaultInteractionMode={{
+        mode: 'custom',
+        extends: InteractionMode.DoubleClickItemToExpand,
+        createInteractiveElementProps: (
+          item,
+          treeId,
+          actions,
+          renderFlags,
+        ) => ({
+          onClick: () => {
+            if (renderFlags.isSelected) {
+              actions.unselectItem();
+            } else {
+              actions.selectItem();
+            }
+          },
+          onMouseOver: () => {
+            props.onHoveredNode(item.index);
+          },
+        }),
+      }}>
+      <ComplexTree
+        treeId="tree"
+        rootItem={props.rootId as any} //the typing in in the library is wrong here
+        treeLabel="UI"
       />
-    </div>
+    </ControlledTreeEnvironment>
   );
 }
 
-function nodesToAntTree(
-  root: Id,
-  nodes: Map<Id, UINode>,
-): [TreeDataNode, Id[]] {
-  const inactive: Id[] = [];
-
-  function uiNodeToAntNode(id: Id): TreeDataNode {
-    const node = nodes.get(id);
-
-    if (node?.activeChild) {
-      for (const child of node.children) {
-        if (child !== node?.activeChild) {
-          inactive.push(child);
-        }
-      }
-    }
-
-    return {
-      key: id,
-      title: node?.name,
-      children: node?.children.map((id) => uiNodeToAntNode(id)),
+function toComplexTree(nodes: Map<Id, UINode>): Record<Id, TreeItem<UINode>> {
+  const res: Record<Id, TreeItem<UINode>> = {};
+  for (const node of nodes.values()) {
+    res[node.id] = {
+      index: node.id,
+      canMove: false,
+      canRename: false,
+      children: node.children,
+      data: node,
+      hasChildren: node.children.length > 0,
     };
   }
-
-  return [uiNodeToAntNode(root), inactive];
+  return res;
 }