third_party/polymer/components-chromium/core-meta/core-meta-extracted.js

   1
   2
   3   (function() {
   4
   5     var SKIP_ID = 'meta';
   6     var metaData = {}, metaArray = {};
   7
   8     Polymer('core-meta', {
   9
  10       /**
  11        * The type of meta-data.  All meta-data with the same type with be
  12        * stored together.
  13        *
  14        * @attribute type
  15        * @type string
  16        * @default 'default'
  17        */
  18       type: 'default',
  19
  20       alwaysPrepare: true,
  21
  22       ready: function() {
  23         this.register(this.id);
  24       },
  25
  26       get metaArray() {
  27         var t = this.type;
  28         if (!metaArray[t]) {
  29           metaArray[t] = [];
  30         }
  31         return metaArray[t];
  32       },
  33
  34       get metaData() {
  35         var t = this.type;
  36         if (!metaData[t]) {
  37           metaData[t] = {};
  38         }
  39         return metaData[t];
  40       },
  41
  42       register: function(id, old) {
  43         if (id && id !== SKIP_ID) {
  44           this.unregister(this, old);
  45           this.metaData[id] = this;
  46           this.metaArray.push(this);
  47         }
  48       },
  49
  50       unregister: function(meta, id) {
  51         delete this.metaData[id || meta.id];
  52         var i = this.metaArray.indexOf(meta);
  53         if (i >= 0) {
  54           this.metaArray.splice(i, 1);
  55         }
  56       },
  57
  58       /**
  59        * Returns a list of all meta-data elements with the same type.
  60        *
  61        * @property list
  62        * @type array
  63        * @default []
  64        */
  65       get list() {
  66         return this.metaArray;
  67       },
  68
  69       /**
  70        * Retrieves meta-data by ID.
  71        *
  72        * @method byId
  73        * @param {String} id The ID of the meta-data to be returned.
  74        * @returns Returns meta-data.
  75        */
  76       byId: function(id) {
  77         return this.metaData[id];
  78       }
  79
  80     });
  81
  82   })();
  83