Function getStartNodeByEdges

src/pages/Workspace/BluePrint.jsx:188–197

(saveNodeData, edge)

    return result.filter(v => { return v })
  }
  const getStartNodeByEdges = (saveNodeData, edge) => {
    // 根据edge获取当前线条的起点(事件开始)
    const { sourceAnchor, source } = edge
    const sourceNode = findNodeById(saveNodeData.nodes, source)
    if ((sourceNode.type === 'element' || sourceNode.type === 'interActive') && (sourceNode.componentsType === 'pagination' ? (sourceAnchor === 0 || sourceAnchor === 1) : sourceAnchor === 0)) {
      // 起点是事件
      return sourceNode
    }

  }
  const targetNodeIsEnd = (node) => {
    // edge的 target是否为结尾(为element)
    if (node.type === 'element') {