text: /**
   * @license
   * Copyright Google LLC All Rights Reserved.
   *
   * Use of this source code is governed by an MIT-style license that can be
   * found in the LICENSE file at https://angular.io/license
   */
  import { Directive, ViewContainerRef, Attribute, ContentChildren, ElementRef, Input, IterableDiffers, ChangeDetectionStrategy, Component, ViewChild, ViewEncapsulation, NgModule } from '@angular/core';
  import { CdkNestedTreeNode, CdkTree, CdkTreeNode, CdkTreeNodeDef, CdkTreeNodePadding, CdkTreeNodeToggle, CdkTreeModule } from '@angular/cdk/tree';
  import { mixinDisabled, mixinTabIndex, MatCommonModule } from '@angular/material/core';
  import { CommonModule } from '@angular/common';
  import { DataSource } from '@angular/cdk/collections';
  import { BehaviorSubject, merge } from 'rxjs';
  import { map, take } from 'rxjs/operators';
  
  /**
   * @fileoverview added by tsickle
   * @suppress {checkTypes,extraRequire,missingReturn,unusedPrivateMembers,uselessCode} checked by tsc
   */
  /**
   * Outlet for nested CdkNode. Put `[matTreeNodeOutlet]` on a tag to place children dataNodes
   * inside the outlet.
   */
  class MatTreeNodeOutlet {
      /**
       * @param {?} viewContainer
       */
      constructor(viewContainer) {
          this.viewContainer = viewContainer;
      }
  }
  MatTreeNodeOutlet.decorators = [
      { type: Directive, args: [{
                  selector: '[matTreeNodeOutlet]'
              },] },
  ];
  /** @nocollapse */
  MatTreeNodeOutlet.ctorParameters = () => [
      { type: ViewContainerRef }
  ];
  
  /**
   * @fileoverview added by tsickle
   * @suppress {checkTypes,extraRequire,missingReturn,unusedPrivateMembers,uselessCode} checked by tsc
   */
  /** @type {?} */
  const _MatTreeNodeMixinBase = mixinTabIndex(mixinDisabled(CdkTreeNode));
  /** @type {?} */
  const _MatNestedTreeNodeMixinBase = mixinTabIndex(mixinDisabled(CdkNestedTreeNode));
  /**
   * Wrapper for the CdkTree node with Material design styles.
   * @template T
   */
  class MatTreeNode extends _MatTreeNodeMixinBase {
      /**
       * @param {?} _elementRef
       * @param {?} _tree
       * @param {?} tabIndex
       */
      constructor(_elementRef, _tree, tabIndex) {
          super(_elementRef, _tree);
          this._elementRef = _elementRef;
          this._tree = _tree;
          this.role = 'treeitem';
          this.tabIndex = Number(tabIndex) || 0;
      }
  }
  MatTreeNode.decorators = [
      { type: Directive, args: [{
                  selector: 'mat-tree-node',
                  exportAs: 'matTreeNode',
                  inputs: ['disabled', 'tabIndex'],
                  host: {
                      '[attr.aria-expanded]': 'isExpanded',
                      '[attr.aria-level]': 'role === "treeitem" ? level : null',
                      '[attr.role]': 'role',
                      'class': 'mat-tree-node'
                  },
                  providers: [{ provide: CdkTreeNode, useExisting: MatTreeNode }]
              },] },
  ];
  /** @nocollapse */
  MatTreeNode.ctorParameters = () => [
      { type: ElementRef },
      { type: CdkTree },
      { type: String, decorators: [{ type: Attribute, args: ['tabindex',] }] }
  ];
  MatTreeNode.propDecorators = {
      role: [{ type: Input }]
  };
  /**
   * Wrapper for the CdkTree node definition with Material design styles.
   * @template T
   */
  class MatTreeNodeDef extends CdkTreeNodeDef {
  }
  MatTreeNodeDef.decorators = [
      { type: Directive, args: [{
                  selector: '[matTreeNodeDef]',
                  inputs: [
                      'when: matTreeNodeDefWhen'
                  ],
                  providers: [{ provide: CdkTreeNodeDef, useExisting: MatTreeNodeDef }]
              },] },
  ];
  MatTreeNodeDef.propDecorators = {
      data: [{ type: Input, args: ['matTreeNode',] }]
  };
  /**
   * Wrapper for the CdkTree nested node with Material design styles.
   * @template T
   */
  class MatNestedTreeNode extends _MatNestedTreeNodeMixinBase {
      /**
       * @param {?} _elementRef
       * @param {?} _tree
       * @param {?} _differs
       * @param {?} tabIndex
       */
      constructor(_elementRef, _tree, _differs, tabIndex) {
          super(_elementRef, _tree, _differs);
          this._elementRef = _elementRef;
          this._tree = _tree;
          this._differs = _differs;
          this.tabIndex = Number(tabIndex) || 0;
      }
      // This is a workaround for https://github.com/angular/angular/issues/23091
      // In aot mode, the lifecycle hooks from parent class are not called.
      // TODO(tinayuangao): Remove when the angular issue #23091 is fixed
      /**
       * @return {?}
       */
      ngAfterContentInit() {
          super.ngAfterContentInit();
      }
      /**
       * @return {?}
       */
      ngOnDestroy() {
          super.ngOnDestroy();
      }
  }
  MatNestedTreeNode.decorators = [
      { type: Directive, args: [{
                  selector: 'mat-nested-tree-node',
                  exportAs: 'matNestedTreeNode',
                  host: {
                      '[attr.aria-expanded]': 'isExpanded',
                      '[attr.role]': 'role',
                      'class': 'mat-nested-tree-node',
                  },
                  inputs: ['disabled', 'tabIndex'],
                  providers: [
                      { provide: CdkNestedTreeNode, useExisting: MatNestedTreeNode },
                      { provide: CdkTreeNode, useExisting: MatNestedTreeNode }
                  ]
              },] },
  ];
  /** @nocollapse */
  MatNestedTreeNode.ctorParameters = () => [
      { type: ElementRef },
      { type: CdkTree },
      { type: IterableDiffers },
      { type: String, decorators: [{ type: Attribute, args: ['tabindex',] }] }
  ];
  MatNestedTreeNode.propDecorators = {
      node: [{ type: Input, args: ['matNestedTreeNode',] }],
      nodeOutlet: [{ type: ContentChildren, args: [MatTreeNodeOutlet,] }]
  };
  
  /**
   * @fileoverview added by tsickle
   * @suppress {checkTypes,extraRequire,missingReturn,unusedPrivateMembers,uselessCode} checked by tsc
   */
  /**
   * Wrapper for the CdkTree padding with Material design styles.
   * @template T
   */
  class MatTreeNodePadding extends CdkTreeNodePadding {
  }
  MatTreeNodePadding.decorators = [
      { type: Directive, args: [{
                  selector: '[matTreeNodePadding]',
                  providers: [{ provide: CdkTreeNodePadding, useExisting: MatTreeNodePadding }]
              },] },
  ];
  MatTreeNodePadding.propDecorators = {
      level: [{ type: Input, args: ['matTreeNodePadding',] }],
      indent: [{ type: Input, args: ['matTreeNodePaddingIndent',] }]
  };
  
  /**
   * @fileoverview added by tsickle
   * @suppress {checkTypes,extraRequire,missingReturn,unusedPrivateMembers,uselessCode} checked by tsc
   */
  /**
   * Wrapper for the CdkTable with Material design styles.
   * @template T
   */
  class MatTree extends CdkTree {
  }
  MatTree.decorators = [
      { type: Component, args: [{selector: 'mat-tree',
                  exportAs: 'matTree',
                  template: `<ng-container matTreeNodeOutlet></ng-container>`,
                  host: {
                      'class': 'mat-tree',
                      'role': 'tree',
                  },
                  styles: [".mat-tree{display:block}.mat-tree-node{display:flex;align-items:center;min-height:48px;flex:1;overflow:hidden;word-wrap:break-word}.mat-nested-tree-ndoe{border-bottom-width:0}"],
                  encapsulation: ViewEncapsulation.None,
                  changeDetection: ChangeDetectionStrategy.OnPush,
                  providers: [{ provide: CdkTree, useExisting: MatTree }]
              },] },
  ];
  MatTree.propDecorators = {
      _nodeOutlet: [{ type: ViewChild, args: [MatTreeNodeOutlet,] }]
  };
  
  /**
   * @fileoverview added by tsickle
   * @suppress {checkTypes,extraRequire,missingReturn,unusedPrivateMembers,uselessCode} checked by tsc
   */
  /**
   * Wrapper for the CdkTree's toggle with Material design styles.
   * @template T
   */
  class MatTreeNodeToggle extends CdkTreeNodeToggle {
      constructor() {
          super(...arguments);
          this.recursive = false;
      }
  }
  MatTreeNodeToggle.decorators = [
      { type: Directive, args: [{
                  selector: '[matTreeNodeToggle]',
                  host: {
                      '(click)': '_toggle($event)',
                  },
                  providers: [{ provide: CdkTreeNodeToggle, useExisting: MatTreeNodeToggle }]
              },] },
  ];
  MatTreeNodeToggle.propDecorators = {
      recursive: [{ type: Input, args: ['matTreeNodeToggleRecursive',] }]
  };
  
  /**
   * @fileoverview added by tsickle
   * @suppress {checkTypes,extraRequire,missingReturn,unusedPrivateMembers,uselessCode} checked by tsc
   */
  /** @type {?} */
  const MAT_TREE_DIRECTIVES = [
      MatNestedTreeNode,
      MatTreeNodeDef,
      MatTreeNodePadding,
      MatTreeNodeToggle,
      MatTree,
      MatTreeNode,
      MatTreeNodeOutlet
  ];
  class MatTreeModule {
  }
  MatTreeModule.decorators = [
      { type: NgModule, args: [{
                  imports: [CdkTreeModule, CommonModule, MatCommonModule],
                  exports: MAT_TREE_DIRECTIVES,
                  declarations: MAT_TREE_DIRECTIVES,
              },] },
  ];
  
  /**
   * @fileoverview added by tsickle
   * @suppress {checkTypes,extraRequire,missingReturn,unusedPrivateMembers,uselessCode} checked by tsc
   */
  /**
   * Tree flattener to convert a normal type of node to node with children & level information.
   * Transform nested nodes of type `T` to flattened nodes of type `F`.
   *
   * For example, the input data of type `T` is nested, and contains its children data:
   *   SomeNode: {
   *     key: 'Fruits',
   *     children: [
   *       NodeOne: {
   *         key: 'Apple',
   *       },
   *       NodeTwo: {
   *        key: 'Pear',
   *      }
   *    ]
   *  }
   *  After flattener flatten the tree, the structure will become
   *  SomeNode: {
   *    key: 'Fruits',
   *    expandable: true,
   *    level: 1
   *  },
   *  NodeOne: {
   *    key: 'Apple',
   *    expandable: false,
   *    level: 2
   *  },
   *  NodeTwo: {
   *   key: 'Pear',
   *   expandable: false,
   *   level: 2
   * }
   * and the output flattened type is `F` with additional information.
   * @template T, F
   */
  class MatTreeFlattener {
      /**
       * @param {?} transformFunction
       * @param {?} getLevel
       * @param {?} isExpandable
       * @param {?} getChildren
       */
      constructor(transformFunction, getLevel, isExpandable, getChildren) {
          this.transformFunction = transformFunction;
          this.getLevel = getLevel;
          this.isExpandable = isExpandable;
          this.getChildren = getChildren;
      }
      /**
       * @param {?} node
       * @param {?} level
       * @param {?} resultNodes
       * @param {?} parentMap
       * @return {?}
       */
      _flattenNode(node, level, resultNodes, parentMap) {
          /** @type {?} */
          const flatNode = this.transformFunction(node, level);
          resultNodes.push(flatNode);
          if (this.isExpandable(flatNode)) {
              /** @type {?} */
              const childrenNodes = this.getChildren(node);
              if (childrenNodes) {
                  if (Array.isArray(childrenNodes)) {
                      this._flattenChildren(childrenNodes, level, resultNodes, parentMap);
                  }
                  else {
                      childrenNodes.pipe(take(1)).subscribe(children => {
                          this._flattenChildren(children, level, resultNodes, parentMap);
                      });
                  }
              }
          }
          return resultNodes;
      }
      /**
       * @param {?} children
       * @param {?} level
       * @param {?} resultNodes
       * @param {?} parentMap
       * @return {?}
       */
      _flattenChildren(children, level, resultNodes, parentMap) {
          children.forEach((child, index) => {
              /** @type {?} */
              let childParentMap = parentMap.slice();
              childParentMap.push(index != children.length - 1);
              this._flattenNode(child, level + 1, resultNodes, childParentMap);
          });
      }
      /**
       * Flatten a list of node type T to flattened version of node F.
       * Please note that type T may be nested, and the length of `structuredData` may be different
       * from that of returned list `F[]`.
       * @param {?} structuredData
       * @return {?}
       */
      flattenNodes(structuredData) {
          /** @type {?} */
          let resultNodes = [];
          structuredData.forEach(node => this._flattenNode(node, 0, resultNodes, []));
          return resultNodes;
      }
      /**
       * Expand flattened node with current expansion status.
       * The returned list may have different length.
       * @param {?} nodes
       * @param {?} treeControl
       * @return {?}
       */
      expandFlattenedNodes(nodes, treeControl) {
          /** @type {?} */
          let results = [];
          /** @type {?} */
          let currentExpand = [];
          currentExpand[0] = true;
          nodes.forEach(node => {
              /** @type {?} */
              let expand = true;
              for (let i = 0; i <= this.getLevel(node); i++) {
                  expand = expand && currentExpand[i];
              }
              if (expand) {
                  results.push(node);
              }
              if (this.isExpandable(node)) {
                  currentExpand[this.getLevel(node) + 1] = treeControl.isExpanded(node);
              }
          });
          return results;
      }
  }
  /**
   * Data source for flat tree.
   * The data source need to handle expansion/collapsion of the tree node and change the data feed
   * to `MatTree`.
   * The nested tree nodes of type `T` are flattened through `MatTreeFlattener`, and converted
   * to type `F` for `MatTree` to consume.
   * @template T, F
   */
  class MatTreeFlatDataSource extends DataSource {
      /**
       * @param {?} treeControl
       * @param {?} treeFlattener
       * @param {?=} initialData
       */
      constructor(treeControl, treeFlattener, initialData = []) {
          super();
          this.treeControl = treeControl;
          this.treeFlattener = treeFlattener;
          this._flattenedData = new BehaviorSubject([]);
          this._expandedData = new BehaviorSubject([]);
          this._data = new BehaviorSubject(initialData);
      }
      /**
       * @return {?}
       */
      get data() { return this._data.value; }
      /**
       * @param {?} value
       * @return {?}
       */
      set data(value) {
          this._data.next(value);
          this._flattenedData.next(this.treeFlattener.flattenNodes(this.data));
          this.treeControl.dataNodes = this._flattenedData.value;
      }
      /**
       * @param {?} collectionViewer
       * @return {?}
       */
      connect(collectionViewer) {
          /** @type {?} */
          const changes = [
              collectionViewer.viewChange,
              this.treeControl.expansionModel.onChange,
              this._flattenedData
          ];
          return merge(...changes).pipe(map(() => {
              this._expandedData.next(this.treeFlattener.expandFlattenedNodes(this._flattenedData.value, this.treeControl));
              return this._expandedData.value;
          }));
      }
      /**
       * @return {?}
       */
      disconnect() {
          // no op
      }
  }
  
  /**
   * @fileoverview added by tsickle
   * @suppress {checkTypes,extraRequire,missingReturn,unusedPrivateMembers,uselessCode} checked by tsc
   */
  /**
   * Data source for nested tree.
   *
   * The data source for nested tree doesn't have to consider node flattener, or the way to expand
   * or collapse. The expansion/collapsion will be handled by TreeControl and each non-leaf node.
   * @template T
   */
  class MatTreeNestedDataSource extends DataSource {
      constructor() {
          super(...arguments);
          this._data = new BehaviorSubject([]);
      }
      /**
       * Data for the nested tree
       * @return {?}
       */
      get data() { return this._data.value; }
      /**
       * @param {?} value
       * @return {?}
       */
      set data(value) { this._data.next(value); }
      /**
       * @param {?} collectionViewer
       * @return {?}
       */
      connect(collectionViewer) {
          return merge(...[collectionViewer.viewChange, this._data])
              .pipe(map(() => {
              return this.data;
          }));
      }
      /**
       * @return {?}
       */
      disconnect() {
          // no op
      }
  }
  
  /**
   * @fileoverview added by tsickle
   * @suppress {checkTypes,extraRequire,missingReturn,unusedPrivateMembers,uselessCode} checked by tsc
   */
  
  /**
   * @fileoverview added by tsickle
   * @suppress {checkTypes,extraRequire,missingReturn,unusedPrivateMembers,uselessCode} checked by tsc
   */
  
  export { _MatTreeNodeMixinBase, _MatNestedTreeNodeMixinBase, MatTreeNode, MatTreeNodeDef, MatNestedTreeNode, MatTreeNodePadding, MatTree, MatTreeModule, MatTreeNodeToggle, MatTreeNodeOutlet, MatTreeFlattener, MatTreeFlatDataSource, MatTreeNestedDataSource };
  //# sourceMappingURL=tree.js.map
  