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import {
NodeCollapseOutlined, DoubleLeftOutlined, NodeExpandOutlined,
DoubleRightOutlined, CheckCircleOutlined, MinusCircleOutlined
} from '@ant-design/icons';
import { useTranslation } from 'react-i18next';
import { ExtendDataNode, TableMetaProps, RecordProps, FormProps } from '@props/RecordProps';
import { Space, Tree } from 'antd';
import { DataNode, EventDataNode } from 'antd/lib/tree';
import { stopPropagationAndPreventDefault } from '@utils/ObjectUtils';
import TreeTitleRender, { TreeNodeOperation } from './TreeTitleRender';
import { PredefinedFilters } from "../../form";
import { emptyMethod } from '@utils/Constants';
import { saveDomain, fetchCurrentValueNoRelationshipColumns } from '@utils/FetchUtils';
import { SERVER_URL } from '@config/base';
import {
buildAllNodesFlat, recursionRemoveNode, recursionAddNode, recursionChangeNodeInfo
} from '@utils/TreeUtils';
import { DataProps } from "@utils/hooks";
import { supportDnd } from '@utils/ComponentUtils';
export interface TreeProps {
domainName: string;
columns: Array<TableMetaProps>;
data: Array<ExtendDataNode>;
onSelect: (selectedKeys: Array<number>) => void;
expandMasterCallback?: () => void;
collapseMasterCallback?: () => void;
onCheck: (checkedNodes: Array<DataNode>) => void;
zIndex: number;
fetchDataCallback: (nodeKey?: string | number) => Promise<void>;
dataDispatch: Dispatch<{ type: "set"; payload: DataProps; }>;
multiple?: boolean;
canCreate: boolean;
layoutForm?: FormProps;
}
// 树控件的默认高度是当前窗口的高度减去 120px,
// 这样正好可以在窗口中完整显示，下边预留一个细条
const FooterContentHeight = 120;
const bestTreeHeight = (window.innerHeight - FooterContentHeight);
/**
* 展开模式， ea: expand all, ca: collapse all, uc: uncontrol
*/
type ExpandMode = "ea" | "ca" | "uc";
type callbackType = (node: ExtendDataNode, index: number, data: Array<ExtendDataNode>) => void;
const TreeComponent = (props: TreeProps): ReactElement => {
const {
domainName, zIndex, data, onSelect, collapseMasterCallback, onCheck,
fetchDataCallback, expandMasterCallback, columns, multiple, canCreate,
layoutForm
} = props;
const { t } = useTranslation();
//ea: expand all, ca: collapse all, uc: uncontrol
const [expandMode, setExpandMode] = useState<ExpandMode>("uc");
const [flatNodes, setFlatNodes] = useState<Array<ExtendDataNode>>([]);
const [selectIds, setSelectIds] = useState<Array<number>>([]);
const pendingSaveNodes = useRef<Set<ExtendDataNode>>(new Set());
const [dragging, setDragging] = useState<boolean>(false);
const [expandedKeys, setExpandedKeys] = useState<Array<string | number>>([]);
const [loadedKeys, setLoadedKeys] = useState<Array<string | number>>([]);
const [currentShowMenuOrModalNode, setCurrentShowMenuOrModalNode] = useState<ExtendDataNode>();
// 是否可拖拽看是否有名称为 displaySequence 的列
const draggable = supportDnd(columns);
// 前端操作过后，前端的数据状态，可能和后台的数据状态不一致
// 如删除和更新之后，前端会先更新前端的数据状态和 UI，然后再向后台发送请求
const [dataState, setDataState] = useState<Array<ExtendDataNode>>([]);
const loadData = ({ key, children, isLeaf }: EventDataNode<ExtendDataNode>): Promise<void> => {
setLoading(true);
return new Promise<void>(resolve => {
if ((children?.length ?? 0) === 0 && (isLeaf === false)) {
fetchDataCallback(key).then(() => {
setLoadedKeys([...new Set([...loadedKeys, key])]);
setLoading(false);
resolve();
});
} else {
setLoading(false);
resolve();
}
});
};
// 是否正在从后台载入数据
const [loading, setLoading] = useState<boolean>();
/** 根据当前浏览器窗口大小设置高度 */
const [height, setHeight] = useState<number>(bestTreeHeight);
const updateDimensions = (): void => {
setHeight(bestTreeHeight);
};
useEffect(() => {
window.addEventListener("resize", updateDimensions);
return () => window.removeEventListener("resize", updateDimensions);
}, []);
useEffect(() => {
const newFlatNodes: Array<ExtendDataNode> = [];
buildAllNodesFlat(data, newFlatNodes);
setFlatNodes(newFlatNodes);
setLoading(false);
setDataState(data);
}, [data]);
useEffect(() => {
// 如果还在从后台载入某个节点的子节点数据，
// 此时 data/flatNodes 数据不是最新的，
// 此时设置 expandedKeys 会导致控件的数据和状态错误
if (loading || flatNodes.length === 0) {
return;
}
if (expandMode === 'uc') {
return;
}
const isExpandAllMode = (expandMode === 'ea');
const newExpandKeys: Array<string | number> = flatNodes
//.filter(n => n.children.length > 0)
.filter((n, idx, arr) => {
// uc 模式下只自动展开之前展开的，有子节点的节点
// ea 模式下，展开所有有子节点的节点
// ca 模式下，关闭所有节点
return (isExpandAllMode ? idx === arr.indexOf(n) : false);
}).map(n => n.key);
if (newExpandKeys.length === 0) {
setLoadedKeys([]);
}
setExpandedKeys(newExpandKeys);
// eslint-disable-next-line react-hooks/exhaustive-deps
}, [data, expandMode, flatNodes, loading]);
const click = (expandMode: ExpandMode, event: React.MouseEvent<HTMLElement>): void => {
stopPropagationAndPreventDefault(event);
setExpandMode(expandMode);
//收起树后，等待 200ms, 将 expandMode 设置为非受控的
//这样用户再次点击某个节点，就可以正常展开其下级节点
//不然第一次时，用户需要点击两次才会展开节点
setTimeout(() => setExpandMode("uc"), 200);
};
const reorderCallback = (dataState: Array<ExtendDataNode>): void => {
pendingSaveNodes.current.forEach((node: ExtendDataNode) => {
const newParent = node.parent ? {
key: node.parent,
isLeaf: false
} as ExtendDataNode : undefined;
const oldNode = flatNodes.filter((n: ExtendDataNode) => n.id === node.id)[0];
const removedOld = recursionRemoveNode([...dataState], oldNode);
const addedNew = recursionAddNode([...removedOld], newParent, node);
setDataState(addedNew);
});
pendingSaveNodes.current = new Set();
};
const onDrop = (info: {
event: React.MouseEvent<unknown>;
//拖拽落下的节点 id,
//对于拖拽调整父节点的，本参数为父节点
//对于拖拽调整节点顺序不变化父节点的，本参数为被拖拽节点落点的上一个节点
node: EventDataNode<ExtendDataNode>;
// 被拖拽的节点
dragNode: EventDataNode<ExtendDataNode>;
dragNodesKeys: Key[];
dropPosition: number;
dropToGap: boolean;
}): void => {
if (dragging) {
return;
}
setDragging(true);
// 如果拖动到另外一个节点的第一个子节点，则 node 参数传递的是父节点
// 如果拖动到另外一个节点的最后一个子节点，则 node 参数传递的是上一个姐妹节点
const dropKey = info.node.key;
const dragKey = info.dragNode.key; ////被拖拽的节点 id
const dropPos = info.node.pos.split('-'); //拖拽落下的位置 最外层到最里层
// info.dropPosition: 被拖拽的节点落下的位置
// dropPos.length - 1: 拖拽落下的节点最内层的位置
// 两者相减，得到被拖拽的节点相对于拖拽落下的节点的位置变化
const positionChange = info.dropPosition - Number(dropPos[dropPos.length - 1]);
// 递归找到某节点并执行 callback 方法
const loop = (data: Array<ExtendDataNode>, key: string | number, callback: callbackType): void => {
for (let i = 0; i < data.length; i++) {
if (data[i].key === key) {
callback(data[i], i, data);
}
// 这里判断 data[i] != null 是为了处理用户将最后一个节点拖动为其他节点的子节点的场景
// 这种情况下，实际 data 的 length 就会减小 1, 那么循环到最后一个元素的时候，就会出现
// 该 index 下的元素已经不存在了
if (data[i] != null && data[i].children != null && (data[i].children?.length ?? -1) > 0) {
loop((data[i].children ?? []) as Array<ExtendDataNode>, key, callback);
}
}
};
const lData = [...data]; //拷贝当前的节点列表用以操作
// Find dragObject and remove it from the data list
let dragObj: ExtendDataNode | undefined;
loop(lData, dragKey, (item, index, arr) => {
console.log(`Drag item(dragObj) ${JSON.stringify(item)}, index: ${index}, sisters: ${JSON.stringify(arr)}`);
arr.splice(index, 1);
dragObj = item;
});
const changedNodes: Set<ExtendDataNode> = new Set();
if (dragObj != null) {
changedNodes.add(dragObj);
}
// 如果被拖拽的节点的原父节点现在已经没有子节点(唯一的子节点已经被拖拽走了)，
// 因此需要将其原父节点的 isLeaf 设置为 true, 隐藏节点前的小三角
// eslint-disable-next-line @typescript-eslint/ban-ts-comment
// @ts-ignore dragObj has been assigned in loop callback
if (dragObj != null && dragObj.parent != null) {
// eslint-disable-next-line @typescript-eslint/ban-ts-comment
// @ts-ignore dragObj has been assigned in loop callback
loop(lData, Number(dragObj.parent), (item) => {
if (item != null && item.children?.length === 0 && item.isLeaf === false) {
item.isLeaf = true;
changedNodes.add(item);
}
});
}
const nodeProps: EventDataNode<{ children: Array<ExtendDataNode> }> = info.node; // 拖动的节点的 props
const dropToEnd = (nodeProps.children || []).length > 0
&& nodeProps.expanded && positionChange === 1;
const handleDropToBeginningAndEnd = (): void => {
loop(lData, dropKey, (item) => {
item.children = item.children || [];
if (dragObj != null) {
dragObj.parent = (typeof item.key === 'string') ? Number(item.key) : item.key;
// 拖入后根据姐妹节点的 displaySequence 来设定拖入节点的
// 如果拖入节点是第一个，则将第一个节点的 displaySequence － 10 得到拖入节点的 displaySequence
// 如果拖入节点是最后一个，则将最后一个节点的 displaySequence + 10 得到拖入节点的 displaySequence
if (item.children.length > 0) {
if (dropToEnd) {
dragObj.displaySequence = (item.children[item.children.length - 1] as ExtendDataNode).displaySequence + 10;
} else {
dragObj.displaySequence = (item.children[0] as ExtendDataNode).displaySequence - 10;
}
}
item.children.unshift(dragObj);
}
// 如果本来是一个叶子节点，现在下面增加了子节点，
// 那么将其 isLeaf 设置为 false,
// 如果所有节点均被删除， 则将其 isLeaf 设置为 true,
// 这里只影响显示，无需调用后台接口进行保存
const originIsLeaf = (item.isLeaf === true);
const nowHasChild = (item.children?.length > 0);
if ((nowHasChild && originIsLeaf) || (!nowHasChild || originIsLeaf)) {
item.isLeaf = !nowHasChild;
}
});
};
// 如果拖动到开始或者结尾
if (!info.dropToGap || dropToEnd) {
handleDropToBeginningAndEnd();
} else { //在姐妹节点中间释放拖动
let sisters: Array<ExtendDataNode> | undefined;
let dropNodeIdx: number | undefined;
loop(lData, dropKey, (item, index, arr) => {
sisters = arr;
dropNodeIdx = index;
});
if (dragObj != null && dropNodeIdx != null && sisters != null) {
const idxToInsert = (positionChange === -1) ? dropNodeIdx : dropNodeIdx + 1;
if (sisters.length > 0) {
const { parent } = sisters[0];
dragObj.parent = parent;
// 将新的节点插入
// eslint-disable-next-line @typescript-eslint/ban-ts-comment
// @ts-ignore sisters and i has been assigned in loop callback
sisters?.splice(idxToInsert, 0, dragObj);
// 如果是插入最后
if ((idxToInsert + 1) === sisters.length) {
// 因为新节点已经被加入 sisters 的最后一个元素, 因此下面的 index 是 sisters.length － 2
const maxSequence = (sisters[sisters.length - 2] as ExtendDataNode).displaySequence;
dragObj.displaySequence = maxSequence + 10;
} else if (idxToInsert === 0) {
// 因为新节点已经被加入到 sisters 的第一个节点，因此下面的 index 是 1
const minSequence = sisters?.[1].displaySequence;
dragObj.displaySequence = minSequence - 10;
} else { //插入到中间
//待插入元素前的部分
const beforePart = sisters.slice(0, idxToInsert);
dragObj.displaySequence = beforePart[beforePart.length - 1].displaySequence + 10;
// 更新影响到的其他节点的 displaySequence
sisters.forEach((elem, idx, arr) => {
// 只处理在当前插入的节点之后的节点，要将后面部分的节点的 displaySequence 加上 10
if (idx > 0 && idx > idxToInsert) {
const previousNodeDisplaySequence = arr[idx - 1].displaySequence;
// 如果当前节点的 displaySequence 比其之前一个要小，那么将当前节点的 displaySequence 加 10
// 如果当前节点的 displaySequence 比其之前一个要大，则不修改，这是为了减小拖动时影响的树节点的修改集
if (elem.displaySequence <= previousNodeDisplaySequence) {
// 如果当前的值不是前一个节点的 displaySequence + 10, 则修改，否则无需修改
const targetDisplaySequence = previousNodeDisplaySequence + 10;
if (elem.displaySequence !== targetDisplaySequence) {
elem.displaySequence = targetDisplaySequence;
changedNodes.add(elem);
}
}
}
});
}
}
}
}
pendingSaveNodes.current = changedNodes;
// 调用后台 API, 批量保存所有更改的节点
saveDomain({
domainName, successCallback: () => reorderCallback(dataState),
failCallback: emptyMethod,
method: "PUT",
url: `${SERVER_URL}/tree/${domainName}`,
values: Array.from(pendingSaveNodes.current),
}).finally(() => setDragging(false));
};
const onExpand = (newExpandedKeys: Key[], info: {
node: EventDataNode<ExtendDataNode>;
expanded: boolean;
nativeEvent?: MouseEvent;
}, forceRefresh?: boolean): void => {
const { node, expanded } = info;
const { key, isLeaf, loaded, children } = node;
const ep = expanded ? [...new Set([...newExpandedKeys, key, ...expandedKeys])] :
[...new Set(newExpandedKeys.filter(n => n !== key))];
setExpandMode('uc');
setExpandedKeys(ep);
// 如果 node 非叶子节点，且当前显示的子节点的数量为 0, 或者调用方指定强制刷新，则刷新数据
// 因为点击了刷新树的图标后，之前 expand 的节点不会再调用 loadData 方法去刷新数据，
// 需要在这里刷新下数据
const refresh = (!isLeaf && loaded && expanded && children?.length === 0) || forceRefresh;
if (refresh) {
setLoading(true);
fetchDataCallback(key).then(() => {
setLoadedKeys([...new Set([...loadedKeys, key])]);
}).finally(() => setLoading(false));
}
};
const deleteCallback = (node?: RecordProps): void => {
if (node != null) {
// 此时从 deleteCallback 回传的 node 只包含 id 了，
const { id } = node;
const newFlatNodes = [...flatNodes].filter((n: ExtendDataNode) => n.id !== id);
setFlatNodes(newFlatNodes);
const newSelectIds = [...selectIds].filter((sid: number) => sid !== id);
setSelectIds(newSelectIds);
const newExpandedKeys = [...expandedKeys ?? []]?.filter((ek: string | number) => ek !== id);
setExpandedKeys(newExpandedKeys);
const newLoadedKeys = [...loadedKeys].filter((lk: string | number) => lk !== id);
setLoadedKeys(newLoadedKeys);
setDataState(recursionRemoveNode([...dataState], node));
} else {
console.error("Delete node is null: ", node);
}
};
const titleRender = (node: ExtendDataNode): ReactNode => {
const selected = selectIds.indexOf(parseInt(node.key.toString())) > -1;
return (<TreeTitleRender
currentShowMenuOrModalNode={currentShowMenuOrModalNode}
setCurrentShowMenuOrModalNode={setCurrentShowMenuOrModalNode}
canCreate={canCreate}
selected={selected}
node={node}
domainName={domainName}
updateDataCallback={(node: DataNode, operation: TreeNodeOperation) => {
// 如果是更新当前节点，则直接从后台获取最新的当前节点的数据
if (operation === 'edit') {
fetchCurrentValueNoRelationshipColumns(domainName, Number.parseInt(node.key.toString())).then(json => {
flatNodes.forEach((n: ExtendDataNode) => {
if (n.id === node.key) {
n.title = json.label || json.name || json.title || n.title;
n.icon = json.icon || n.icon;
n.title && setDataState(recursionChangeNodeInfo([...dataState], n.id, n.title.toString(), n.icon));
}
});
});
} else if (operation === 'addChild') {
// 如果是在当前节点下新增子节点，则调用 onExpand 展开当前节点
onExpand(expandedKeys ?? [], {
node: ({ //手动构造一个 onExpand 方法用到的属性列表
key: node.key,
isLeaf: false,
loaded: true,
} as EventDataNode<ExtendDataNode>),
expanded: true,
}, true);
}
}}
deleteCallback={deleteCallback}
zIndex={zIndex}
updateFormName={layoutForm?.extInfo?.updateFormName}
/>);
};
return (
<div>
<div className="tree-menu-container">
<span className='tree-operation-container'>
<Space direction="horizontal" size={6}>
{collapseMasterCallback &&
<DoubleLeftOutlined
title={t('Click to collapse panel')}
onClick={(e: React.MouseEvent<HTMLElement>) => {
stopPropagationAndPreventDefault(e);
collapseMasterCallback();
}}
/>
}
<NodeExpandOutlined
onClick={(e: React.MouseEvent<HTMLElement>) => click("ea", e)}
title={t('Click to expand all child nodes')}
/>
<NodeCollapseOutlined
onClick={(e: React.MouseEvent<HTMLElement>) => click("ca", e)}
title={t('Click to collapse all child nodes')}
/>
{multiple && (<><CheckCircleOutlined
title={t('Click to select all nodes')}
onClick={(e: React.MouseEvent<HTMLElement>) => {
stopPropagationAndPreventDefault(e);
const selectedKeys = flatNodes.map(d => d.id);
onSelect(selectedKeys);
setSelectIds(selectedKeys);
onCheck(flatNodes);
}}
/>
<MinusCircleOutlined
title={t('Click to clear all nodes selection')}
onClick={(e: React.MouseEvent<HTMLElement>) => {
stopPropagationAndPreventDefault(e);
onSelect([]);
setSelectIds([]);
onCheck([]);
}}
/></>
)}
<span
className="expand-tree-icon"
onClick={() => expandMasterCallback?.()}
title={t('Click to expand panel')}
>
<DoubleRightOutlined />
</span>
</Space>
</span>
<span className="tree-component-filters">
<PredefinedFilters
domainName={domainName}
fetchDataCallback={fetchDataCallback}
columns={columns}
displayStyle='inline'
zIndex={zIndex}
/>
</span>
</div>
<Tree
className={`${draggable ? 'tree-draggable' : 'tree-non-draggable'}`}
checkedKeys={selectIds}
titleRender={titleRender}
onExpand={onExpand}
treeData={dataState}
checkable={true}
multiple={multiple}
height={height}
selectedKeys={selectIds}
expandedKeys={expandedKeys}
onCheck={(checked: {
checked: Key[];
halfChecked: Key[];
} | Key[], info: {
event: 'check';
node: EventDataNode<ExtendDataNode>;
checked: boolean;
nativeEvent: MouseEvent;
checkedNodes: DataNode[];
checkedNodesPositions?: {
node: DataNode;
pos: string;
}[];
halfCheckedKeys?: Key[];
}) => {
onCheck(info.checkedNodes);
const newSelectIds: Array<number> = [...info.checkedNodes.map(n => parseInt(n.key.toString()))];
setSelectIds(newSelectIds);
onSelect([...newSelectIds]);
}}
onSelect={(selectedKeys: Key[]): void => {
const ids: Array<number> = selectedKeys.map(sk => parseInt(sk.toString()));
setSelectIds(ids);
onSelect(ids);
onCheck(flatNodes.filter((n: ExtendDataNode) => ids.indexOf(n.id) > -1));
}}
draggable={draggable}
onDragEnter={emptyMethod}
onDrop={onDrop}
checkStrictly={true}
loadedKeys={loadedKeys}
loadData={loadData}
/>
</div>
);
};
export default TreeComponent;
|