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node-children.ts
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208 lines (186 loc) · 4.86 KB
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import { NodeChildren as InnerNodeChildren, Node as InnerNode } from '@alilc/lowcode-designer';
import { NodeSchema, NodeData, TransformStage } from '@alilc/lowcode-types';
import Node from './node';
import { nodeSymbol, nodeChildrenSymbol } from './symbols';
export default class NodeChildren {
private readonly [nodeChildrenSymbol]: InnerNodeChildren;
constructor(nodeChildren: InnerNodeChildren) {
this[nodeChildrenSymbol] = nodeChildren;
}
static create(nodeChldren: InnerNodeChildren | null) {
if (!nodeChldren) return null;
return new NodeChildren(nodeChldren);
}
/**
* 返回当前 children 实例所属的节点实例
*/
get owner(): Node | null {
return Node.create(this[nodeChildrenSymbol].owner);
}
/**
* children 内的节点实例数
*/
get size() {
return this[nodeChildrenSymbol].size;
}
/**
* 是否为空
* @returns
*/
get isEmpty() {
return this[nodeChildrenSymbol].isEmpty();
}
/**
* 删除指定节点
* @param node
* @returns
*/
delete(node: Node) {
return this[nodeChildrenSymbol].delete(node[nodeSymbol]);
}
/**
* 插入一个节点
* @param node 待插入节点
* @param at 插入下标
* @returns
*/
insert(node: Node, at?: number | null) {
return this[nodeChildrenSymbol].insert(node[nodeSymbol], at, true);
}
/**
* 返回指定节点的下标
* @param node
* @returns
*/
indexOf(node: Node) {
return this[nodeChildrenSymbol].indexOf(node[nodeSymbol]);
}
/**
* 类似数组 splice 操作
* @param start
* @param deleteCount
* @param node
*/
splice(start: number, deleteCount: number, node?: Node) {
this[nodeChildrenSymbol].splice(start, deleteCount, node?.[nodeSymbol]);
}
/**
* 返回指定下标的节点
* @param index
* @returns
*/
get(index: number) {
return this[nodeChildrenSymbol].get(index);
}
/**
* 是否包含指定节点
* @param node
* @returns
*/
has(node: Node) {
return this[nodeChildrenSymbol].has(node[nodeSymbol]);
}
/**
* 类似数组的 forEach
* @param fn
*/
forEach(fn: (node: Node, index: number) => void) {
this[nodeChildrenSymbol].forEach((item: InnerNode<NodeSchema>, index: number) => {
fn(Node.create(item)!, index);
});
}
/**
* 类似数组的 map
* @param fn
*/
map<T>(fn: (node: Node, index: number) => T[]) {
return this[nodeChildrenSymbol].map((item: InnerNode<NodeSchema>, index: number) => {
return fn(Node.create(item)!, index);
});
}
/**
* 类似数组的 every
* @param fn
*/
every(fn: (node: Node, index: number) => boolean) {
return this[nodeChildrenSymbol].every((item: InnerNode<NodeSchema>, index: number) => {
return fn(Node.create(item)!, index);
});
}
/**
* 类似数组的 some
* @param fn
*/
some(fn: (node: Node, index: number) => boolean) {
return this[nodeChildrenSymbol].some((item: InnerNode<NodeSchema>, index: number) => {
return fn(Node.create(item)!, index);
});
}
/**
* 类似数组的 filter
* @param fn
*/
filter(fn: (node: Node, index: number) => boolean) {
return this[nodeChildrenSymbol]
.filter((item: InnerNode<NodeSchema>, index: number) => {
return fn(Node.create(item)!, index);
})
.map((item: InnerNode<NodeSchema>) => Node.create(item)!);
}
/**
* 类似数组的 find
* @param fn
*/
find(fn: (node: Node, index: number) => boolean) {
return Node.create(
this[nodeChildrenSymbol].find((item: InnerNode<NodeSchema>, index: number) => {
return fn(Node.create(item)!, index);
}),
);
}
/**
* 类似数组的 reduce
* @param fn
*/
reduce(fn: (acc: any, cur: Node) => any, initialValue: any) {
return this[nodeChildrenSymbol].reduce((acc: any, cur: InnerNode) => {
return fn(acc, Node.create(cur)!);
}, initialValue);
}
/**
* 导入 schema
* @param data
*/
importSchema(data?: NodeData | NodeData[]) {
this[nodeChildrenSymbol].import(data);
}
/**
* 导出 schema
* @param stage
* @returns
*/
exportSchema(stage: TransformStage = TransformStage.Render) {
return this[nodeChildrenSymbol].export(stage);
}
/**
* 执行新增、删除、排序等操作
* @param remover
* @param adder
* @param sorter
*/
mergeChildren(
remover: (node: Node, idx: number) => boolean,
adder: (children: Node[]) => any,
sorter: (firstNode: Node, secondNode: Node) => number,
) {
if (!sorter) {
sorter = () => 0;
}
this[nodeChildrenSymbol].mergeChildren(
(node: InnerNode, idx: number) => remover(Node.create(node)!, idx),
(children: InnerNode[]) => adder(children.map((node) => Node.create(node)!)),
(firstNode: InnerNode, secondNode: InnerNode) =>
sorter(Node.create(firstNode)!, Node.create(secondNode)!),
);
}
}