isu-element/utils/tree/util.js

Polymer components for building web apps.

export const NODE_KEY = '$treeNodeId';

export const markNodeData = function(node, data) {
  if (!data || data[NODE_KEY]) return;
  Object.defineProperty(data, NODE_KEY, {
    value: node.id,
    enumerable: false,
    configurable: false,
    writable: false
  });
};

export const getNodeKey = function(key, data) {
  if (!key) return data[NODE_KEY];
  return data[key];
};

export const findNearestComponent = (element, componentName) => {
  let target = element;
  while (target && target.tagName !== 'BODY') {
    if (target.__vue__ && target.__vue__.$options.name === componentName) {
      return target.__vue__;
    }
    target = target.parentNode;
  }
  return null;
};

export const arrayFindIndex = function(arr, pred) {
  for (let i = 0; i !== arr.length; ++i) {
    if (pred(arr[i])) {
      return i;
    }
  }
  return -1;
};

export const objectAssign = function(target) {
  for (let i = 1, j = arguments.length; i < j; i++) {
    let source = arguments[i] || {};
    for (let prop in source) {
      if (source.hasOwnProperty(prop)) {
        let value = source[prop];
        if (value !== undefined) {
          target[prop] = value;
        }
      }
    }
  }

  return target;
};