'use strict';
/**
 @polymer
 @mixinFunction
 */
let ArraySelectorMixin$$module$third_party$javascript$polymer$v2$polymer$lib$elements$array_selector = module$third_party$javascript$polymer$v2$polymer$lib$utils$mixin.dedupingMixin((superClass) => {
  /**
   @private
   @constructor
   @implements {Polymer_ElementMixin}
   */
  let elementBase = module$third_party$javascript$polymer$v2$polymer$lib$mixins$element_mixin.ElementMixin(superClass);
  /**
   @unrestricted 
   @implements {Polymer_ArraySelectorMixin}
   @polymer
   @mixinClass
   */
  class ArraySelectorMixin extends elementBase {
    /**
     @return {PolymerElementProperties}
     */
    static get properties() {
      return $jscomp.reflectObject(ArraySelectorMixin, {items:{type:Array}, multi:{type:Boolean, value:false}, selected:{type:Object, notify:true}, selectedItem:{type:Object, notify:true}, toggle:{type:Boolean, value:false}});
    }
    /**
     @return {!Array<string>}
     */
    static get observers() {
      return [$jscomp.reflectProperty("__updateSelection", /** @type {!ArraySelectorMixin} */ ({})) + "(" + $jscomp.reflectProperty("multi", /** @type {!ArraySelectorMixin} */ ({})) + "," + $jscomp.reflectProperty("items", /** @type {!ArraySelectorMixin} */ ({})) + ".*" + ")"];
    }
    constructor() {
      super();
      this.__lastItems = null;
      this.__lastMulti = null;
      this.__selectedMap = null;
    }
    __updateSelection(multi, itemsInfo) {
      let path = itemsInfo.path;
      if (path == "items") {
        let newItems = itemsInfo.base || [];
        let lastItems = this.__lastItems;
        let lastMulti = this.__lastMulti;
        if (multi !== lastMulti) {
          this.clearSelection();
        }
        if (lastItems) {
          let splices = module$third_party$javascript$polymer$v2$polymer$lib$utils$array_splice.calculateSplices(newItems, lastItems);
          this.__applySplices(splices);
        }
        this.__lastItems = newItems;
        this.__lastMulti = multi;
      } else {
        if (itemsInfo.path == "items.splices") {
          this.__applySplices(itemsInfo.value.indexSplices);
        } else {
          let part = path.slice("items.".length);
          let idx = parseInt(part, 10);
          if (part.indexOf(".") < 0 && part == idx) {
            this.__deselectChangedIdx(idx);
          }
        }
      }
    }
    __applySplices(splices) {
      let selected = this.__selectedMap;
      for (let i = 0; i < splices.length; i++) {
        let s = splices[i];
        selected.forEach((idx, item) => {
          if (idx < s.index) {
          } else {
            if (idx >= s.index + s.removed.length) {
              selected.set(item, idx + s.addedCount - s.removed.length);
            } else {
              selected.set(item, -1);
            }
          }
        });
        for (let j = 0; j < s.addedCount; j++) {
          let idx = s.index + j;
          if (selected.has(this.items[idx])) {
            selected.set(this.items[idx], idx);
          }
        }
      }
      this.__updateLinks();
      let sidx = 0;
      selected.forEach((idx, item) => {
        if (idx < 0) {
          if (this.multi) {
            this.splice("selected", sidx, 1);
          } else {
            this.selected = this.selectedItem = null;
          }
          selected.delete(item);
        } else {
          sidx++;
        }
      });
    }
    __updateLinks() {
      this.__dataLinkedPaths = {};
      if (this.multi) {
        let sidx = 0;
        this.__selectedMap.forEach((idx) => {
          if (idx >= 0) {
            this.linkPaths("items." + idx, "selected." + sidx++);
          }
        });
      } else {
        this.__selectedMap.forEach((idx) => {
          this.linkPaths("selected", "items." + idx);
          this.linkPaths("selectedItem", "items." + idx);
        });
      }
    }
    /**
     @return {void}
     @override
     */
    clearSelection() {
      this.__dataLinkedPaths = {};
      this.__selectedMap = new Map;
      this.selected = this.multi ? [] : null;
      this.selectedItem = null;
    }
    /**
     @param {*} item
     @return {boolean}
     @override
     */
    isSelected(item) {
      return this.__selectedMap.has(item);
    }
    /**
     @param {number} idx
     @return {boolean}
     @override
     */
    isIndexSelected(idx) {
      return this.isSelected(this.items[idx]);
    }
    __deselectChangedIdx(idx) {
      let sidx = this.__selectedIndexForItemIndex(idx);
      if (sidx >= 0) {
        let i = 0;
        this.__selectedMap.forEach((idx, item) => {
          if (sidx == i++) {
            this.deselect(item);
          }
        });
      }
    }
    __selectedIndexForItemIndex(idx) {
      let selected = this.__dataLinkedPaths["items." + idx];
      if (selected) {
        return parseInt(selected.slice("selected.".length), 10);
      }
    }
    /**
     @param {*} item
     @return {void}
     @override
     */
    deselect(item) {
      let idx = this.__selectedMap.get(item);
      if (idx >= 0) {
        this.__selectedMap.delete(item);
        let sidx;
        if (this.multi) {
          sidx = this.__selectedIndexForItemIndex(idx);
        }
        this.__updateLinks();
        if (this.multi) {
          this.splice("selected", sidx, 1);
        } else {
          this.selected = this.selectedItem = null;
        }
      }
    }
    /**
     @param {number} idx
     @return {void}
     @override
     */
    deselectIndex(idx) {
      this.deselect(this.items[idx]);
    }
    /**
     @param {*} item
     @return {void}
     @override
     */
    select(item) {
      this.selectIndex(this.items.indexOf(item));
    }
    /**
     @param {number} idx
     @return {void}
     @override
     */
    selectIndex(idx) {
      let item = this.items[idx];
      if (!this.isSelected(item)) {
        if (!this.multi) {
          this.__selectedMap.clear();
        }
        this.__selectedMap.set(item, idx);
        this.__updateLinks();
        if (this.multi) {
          this.push("selected", item);
        } else {
          this.selected = this.selectedItem = item;
        }
      } else {
        if (this.toggle) {
          this.deselectIndex(idx);
        }
      }
    }
  }
  /** @type {!Array} */ ArraySelectorMixin.prototype.items;
  /** @type {boolean} */ ArraySelectorMixin.prototype.multi;
  /** @type {(?Object|?Array<!Object>)} */ ArraySelectorMixin.prototype.selected;
  /** @type {?Object} */ ArraySelectorMixin.prototype.selectedItem;
  /** @type {boolean} */ ArraySelectorMixin.prototype.toggle;
  /**
   @suppress {uselessCode}
   */
  (function() {
    ArraySelectorMixin.prototype.__updateSelection;
    ArraySelectorMixin.prototype.multi;
    ArraySelectorMixin.prototype.items;
  })();
  return ArraySelectorMixin;
});
/**
 @private
 @constructor
 @extends {module$third_party$javascript$polymer$v2$polymer$polymer_element.PolymerElement}
 @implements {Polymer_ArraySelectorMixin}
 */
let baseArraySelector$$module$third_party$javascript$polymer$v2$polymer$lib$elements$array_selector = ArraySelectorMixin$$module$third_party$javascript$polymer$v2$polymer$lib$elements$array_selector(module$third_party$javascript$polymer$v2$polymer$polymer_element.PolymerElement);
/**
 @extends {baseArraySelector$$module$third_party$javascript$polymer$v2$polymer$lib$elements$array_selector}
 @polymer
 @customElement
 */
class ArraySelector$$module$third_party$javascript$polymer$v2$polymer$lib$elements$array_selector extends baseArraySelector$$module$third_party$javascript$polymer$v2$polymer$lib$elements$array_selector {
  /**
   @return {string}
   */
  static get is() {
    return "array-selector";
  }
  static get template() {
    return null;
  }
}
customElements.define(ArraySelector$$module$third_party$javascript$polymer$v2$polymer$lib$elements$array_selector.is, ArraySelector$$module$third_party$javascript$polymer$v2$polymer$lib$elements$array_selector);
/** @const */ var module$third_party$javascript$polymer$v2$polymer$lib$elements$array_selector = {};
/** @const */ module$third_party$javascript$polymer$v2$polymer$lib$elements$array_selector.ArraySelectorMixin = ArraySelectorMixin$$module$third_party$javascript$polymer$v2$polymer$lib$elements$array_selector;
/** @const */ module$third_party$javascript$polymer$v2$polymer$lib$elements$array_selector.ArraySelector = ArraySelector$$module$third_party$javascript$polymer$v2$polymer$lib$elements$array_selector;