skyquake/plugins/composer/src/src/libraries/UniqueId.js

   1 /**
   2  * Created by onvelocity on 2/12/16.
   3  */
   4 'use strict';
   5 import d3 from 'd3'
   6 import guid from './guid'
   7 import DescriptorModel from './model/DescriptorModel'
   8 export default class UID {
   9
  10         static get propertyName() {
  11                 return ':uid';
  12         }
  13
  14         static create() {
  15                 return guid();
  16         }
  17
  18         static from(obj) {
  19                 if (!obj || /undefined|null/.test(obj)) {
  20                         return;
  21                 }
  22                 if (obj instanceof DescriptorModel) {
  23                         // a descriptor instance
  24                         return obj.uid;
  25                 }
  26                 if (obj.dataset && obj.dataset.uid) {
  27                         // DOM Element
  28                         obj = obj.dataset.uid;
  29                 } else if (obj.__data__ && obj.__data__.uid) {
  30                         // d3 managed element
  31                         obj = obj.__data__.uid;
  32                 } else if (obj instanceof Element) {
  33                         obj = d3.select(obj).attr('data-uid');
  34                 }
  35                 if (!obj || /undefined|null/.test(obj)) {
  36                         return;
  37                 }
  38                 const uid = typeof obj === 'object' ? obj[UID.propertyName] || (obj.uiState && obj.uiState[UID.propertyName]) : obj;
  39                 if (typeof uid === 'string') {
  40                         return uid;
  41                 }
  42         }
  43
  44         static hasUniqueId(obj) {
  45                 return !!UID.from(obj);
  46         }
  47
  48         static assignUniqueId(obj) {
  49                 return obj[UID.propertyName] = UID.create();
  50         }
  51
  52 }