/**
 * @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
 */
(function (global, factory) {
	typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports, require('@angular/cdk/collections'), require('rxjs'), require('rxjs/operators'), require('@angular/core'), require('@angular/cdk/bidi'), require('@angular/cdk/coercion'), require('@angular/cdk/a11y'), require('@angular/common')) :
	typeof define === 'function' && define.amd ? define('@angular/cdk/tree', ['exports', '@angular/cdk/collections', 'rxjs', 'rxjs/operators', '@angular/core', '@angular/cdk/bidi', '@angular/cdk/coercion', '@angular/cdk/a11y', '@angular/common'], factory) :
	(factory((global.ng = global.ng || {}, global.ng.cdk = global.ng.cdk || {}, global.ng.cdk.tree = {}),global.ng.cdk.collections,global.rxjs,global.rxjs.operators,global.ng.core,global.ng.cdk.bidi,global.ng.cdk.coercion,global.ng.cdk.a11y,global.ng.common));
}(this, (function (exports,collections,rxjs,operators,core,bidi,coercion,a11y,common) { 'use strict';

/*! *****************************************************************************
Copyright (c) Microsoft Corporation. All rights reserved.
Licensed under the Apache License, Version 2.0 (the "License"); you may not use
this file except in compliance with the License. You may obtain a copy of the
License at http://www.apache.org/licenses/LICENSE-2.0

THIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE,
MERCHANTABLITY OR NON-INFRINGEMENT.

See the Apache Version 2.0 License for specific language governing permissions
and limitations under the License.
***************************************************************************** */
/* global Reflect, Promise */

var extendStatics = function(d, b) {
    extendStatics = Object.setPrototypeOf ||
        ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
        function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };
    return extendStatics(d, b);
};

function __extends(d, b) {
    extendStatics(d, b);
    function __() { this.constructor = d; }
    d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
}

/**
 * @fileoverview added by tsickle
 * @suppress {checkTypes,extraRequire,missingReturn,unusedPrivateMembers,uselessCode} checked by tsc
 */
/**
 * Base tree control. It has basic toggle/expand/collapse operations on a single data node.
 * @abstract
 * @template T
 */
var   /**
 * Base tree control. It has basic toggle/expand/collapse operations on a single data node.
 * @abstract
 * @template T
 */
BaseTreeControl = /** @class */ (function () {
    function BaseTreeControl() {
        /**
         * A selection model with multi-selection to track expansion status.
         */
        this.expansionModel = new collections.SelectionModel(true);
    }
    /** Toggles one single data node's expanded/collapsed state. */
    /**
     * Toggles one single data node's expanded/collapsed state.
     * @param {?} dataNode
     * @return {?}
     */
    BaseTreeControl.prototype.toggle = /**
     * Toggles one single data node's expanded/collapsed state.
     * @param {?} dataNode
     * @return {?}
     */
    function (dataNode) {
        this.expansionModel.toggle(dataNode);
    };
    /** Expands one single data node. */
    /**
     * Expands one single data node.
     * @param {?} dataNode
     * @return {?}
     */
    BaseTreeControl.prototype.expand = /**
     * Expands one single data node.
     * @param {?} dataNode
     * @return {?}
     */
    function (dataNode) {
        this.expansionModel.select(dataNode);
    };
    /** Collapses one single data node. */
    /**
     * Collapses one single data node.
     * @param {?} dataNode
     * @return {?}
     */
    BaseTreeControl.prototype.collapse = /**
     * Collapses one single data node.
     * @param {?} dataNode
     * @return {?}
     */
    function (dataNode) {
        this.expansionModel.deselect(dataNode);
    };
    /** Whether a given data node is expanded or not. Returns true if the data node is expanded. */
    /**
     * Whether a given data node is expanded or not. Returns true if the data node is expanded.
     * @param {?} dataNode
     * @return {?}
     */
    BaseTreeControl.prototype.isExpanded = /**
     * Whether a given data node is expanded or not. Returns true if the data node is expanded.
     * @param {?} dataNode
     * @return {?}
     */
    function (dataNode) {
        return this.expansionModel.isSelected(dataNode);
    };
    /** Toggles a subtree rooted at `node` recursively. */
    /**
     * Toggles a subtree rooted at `node` recursively.
     * @param {?} dataNode
     * @return {?}
     */
    BaseTreeControl.prototype.toggleDescendants = /**
     * Toggles a subtree rooted at `node` recursively.
     * @param {?} dataNode
     * @return {?}
     */
    function (dataNode) {
        this.expansionModel.isSelected(dataNode)
            ? this.collapseDescendants(dataNode)
            : this.expandDescendants(dataNode);
    };
    /** Collapse all dataNodes in the tree. */
    /**
     * Collapse all dataNodes in the tree.
     * @return {?}
     */
    BaseTreeControl.prototype.collapseAll = /**
     * Collapse all dataNodes in the tree.
     * @return {?}
     */
    function () {
        this.expansionModel.clear();
    };
    /** Expands a subtree rooted at given data node recursively. */
    /**
     * Expands a subtree rooted at given data node recursively.
     * @param {?} dataNode
     * @return {?}
     */
    BaseTreeControl.prototype.expandDescendants = /**
     * Expands a subtree rooted at given data node recursively.
     * @param {?} dataNode
     * @return {?}
     */
    function (dataNode) {
        var _a;
        /** @type {?} */
        var toBeProcessed = [dataNode];
        toBeProcessed.push.apply(toBeProcessed, this.getDescendants(dataNode));
        (_a = this.expansionModel).select.apply(_a, toBeProcessed);
    };
    /** Collapses a subtree rooted at given data node recursively. */
    /**
     * Collapses a subtree rooted at given data node recursively.
     * @param {?} dataNode
     * @return {?}
     */
    BaseTreeControl.prototype.collapseDescendants = /**
     * Collapses a subtree rooted at given data node recursively.
     * @param {?} dataNode
     * @return {?}
     */
    function (dataNode) {
        var _a;
        /** @type {?} */
        var toBeProcessed = [dataNode];
        toBeProcessed.push.apply(toBeProcessed, this.getDescendants(dataNode));
        (_a = this.expansionModel).deselect.apply(_a, toBeProcessed);
    };
    return BaseTreeControl;
}());

/**
 * @fileoverview added by tsickle
 * @suppress {checkTypes,extraRequire,missingReturn,unusedPrivateMembers,uselessCode} checked by tsc
 */
/**
 * Flat tree control. Able to expand/collapse a subtree recursively for flattened tree.
 * @template T
 */
var   /**
 * Flat tree control. Able to expand/collapse a subtree recursively for flattened tree.
 * @template T
 */
FlatTreeControl = /** @class */ (function (_super) {
    __extends(FlatTreeControl, _super);
    /** Construct with flat tree data node functions getLevel and isExpandable. */
    function FlatTreeControl(getLevel, isExpandable) {
        var _this = _super.call(this) || this;
        _this.getLevel = getLevel;
        _this.isExpandable = isExpandable;
        return _this;
    }
    /**
     * Gets a list of the data node's subtree of descendent data nodes.
     *
     * To make this working, the `dataNodes` of the TreeControl must be flattened tree nodes
     * with correct levels.
     */
    /**
     * Gets a list of the data node's subtree of descendent data nodes.
     *
     * To make this working, the `dataNodes` of the TreeControl must be flattened tree nodes
     * with correct levels.
     * @param {?} dataNode
     * @return {?}
     */
    FlatTreeControl.prototype.getDescendants = /**
     * Gets a list of the data node's subtree of descendent data nodes.
     *
     * To make this working, the `dataNodes` of the TreeControl must be flattened tree nodes
     * with correct levels.
     * @param {?} dataNode
     * @return {?}
     */
    function (dataNode) {
        /** @type {?} */
        var startIndex = this.dataNodes.indexOf(dataNode);
        /** @type {?} */
        var results = [];
        // Goes through flattened tree nodes in the `dataNodes` array, and get all descendants.
        // The level of descendants of a tree node must be greater than the level of the given
        // tree node.
        // If we reach a node whose level is equal to the level of the tree node, we hit a sibling.
        // If we reach a node whose level is greater than the level of the tree node, we hit a
        // sibling of an ancestor.
        for (var i = startIndex + 1; i < this.dataNodes.length && this.getLevel(dataNode) < this.getLevel(this.dataNodes[i]); i++) {
            results.push(this.dataNodes[i]);
        }
        return results;
    };
    /**
     * Expands all data nodes in the tree.
     *
     * To make this working, the `dataNodes` variable of the TreeControl must be set to all flattened
     * data nodes of the tree.
     */
    /**
     * Expands all data nodes in the tree.
     *
     * To make this working, the `dataNodes` variable of the TreeControl must be set to all flattened
     * data nodes of the tree.
     * @return {?}
     */
    FlatTreeControl.prototype.expandAll = /**
     * Expands all data nodes in the tree.
     *
     * To make this working, the `dataNodes` variable of the TreeControl must be set to all flattened
     * data nodes of the tree.
     * @return {?}
     */
    function () {
        var _a;
        (_a = this.expansionModel).select.apply(_a, this.dataNodes);
    };
    return FlatTreeControl;
}(BaseTreeControl));

/**
 * @fileoverview added by tsickle
 * @suppress {checkTypes,extraRequire,missingReturn,unusedPrivateMembers,uselessCode} checked by tsc
 */
/**
 * Nested tree control. Able to expand/collapse a subtree recursively for NestedNode type.
 * @template T
 */
var   /**
 * Nested tree control. Able to expand/collapse a subtree recursively for NestedNode type.
 * @template T
 */
NestedTreeControl = /** @class */ (function (_super) {
    __extends(NestedTreeControl, _super);
    /** Construct with nested tree function getChildren. */
    function NestedTreeControl(getChildren) {
        var _this = _super.call(this) || this;
        _this.getChildren = getChildren;
        return _this;
    }
    /**
     * Expands all dataNodes in the tree.
     *
     * To make this working, the `dataNodes` variable of the TreeControl must be set to all root level
     * data nodes of the tree.
     */
    /**
     * Expands all dataNodes in the tree.
     *
     * To make this working, the `dataNodes` variable of the TreeControl must be set to all root level
     * data nodes of the tree.
     * @return {?}
     */
    NestedTreeControl.prototype.expandAll = /**
     * Expands all dataNodes in the tree.
     *
     * To make this working, the `dataNodes` variable of the TreeControl must be set to all root level
     * data nodes of the tree.
     * @return {?}
     */
    function () {
        var _this = this;
        var _a;
        this.expansionModel.clear();
        /** @type {?} */
        var allNodes = this.dataNodes.reduce(function (accumulator, dataNode) {
            return accumulator.concat(_this.getDescendants(dataNode), [dataNode]);
        }, []);
        (_a = this.expansionModel).select.apply(_a, allNodes);
    };
    /** Gets a list of descendant dataNodes of a subtree rooted at given data node recursively. */
    /**
     * Gets a list of descendant dataNodes of a subtree rooted at given data node recursively.
     * @param {?} dataNode
     * @return {?}
     */
    NestedTreeControl.prototype.getDescendants = /**
     * Gets a list of descendant dataNodes of a subtree rooted at given data node recursively.
     * @param {?} dataNode
     * @return {?}
     */
    function (dataNode) {
        /** @type {?} */
        var descendants = [];
        this._getDescendants(descendants, dataNode);
        // Remove the node itself
        return descendants.splice(1);
    };
    /** A helper function to get descendants recursively. */
    /**
     * A helper function to get descendants recursively.
     * @protected
     * @param {?} descendants
     * @param {?} dataNode
     * @return {?}
     */
    NestedTreeControl.prototype._getDescendants = /**
     * A helper function to get descendants recursively.
     * @protected
     * @param {?} descendants
     * @param {?} dataNode
     * @return {?}
     */
    function (descendants, dataNode) {
        var _this = this;
        descendants.push(dataNode);
        /** @type {?} */
        var childrenNodes = this.getChildren(dataNode);
        if (Array.isArray(childrenNodes)) {
            childrenNodes.forEach(function (child) { return _this._getDescendants(descendants, child); });
        }
        else if (childrenNodes instanceof rxjs.Observable) {
            childrenNodes.pipe(operators.take(1), operators.filter(Boolean)).subscribe(function (children) {
                children.forEach(function (child) { return _this._getDescendants(descendants, child); });
            });
        }
    };
    return NestedTreeControl;
}(BaseTreeControl));

/**
 * @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
 */
/**
 * Context provided to the tree node component.
 * @template T
 */
var   /**
 * Context provided to the tree node component.
 * @template T
 */
CdkTreeNodeOutletContext = /** @class */ (function () {
    function CdkTreeNodeOutletContext(data) {
        this.$implicit = data;
    }
    return CdkTreeNodeOutletContext;
}());
/**
 * Data node definition for the CdkTree.
 * Captures the node's template and a when predicate that describes when this node should be used.
 * @template T
 */
var CdkTreeNodeDef = /** @class */ (function () {
    /** @docs-private */
    function CdkTreeNodeDef(template) {
        this.template = template;
    }
    CdkTreeNodeDef.decorators = [
        { type: core.Directive, args: [{
                    selector: '[cdkTreeNodeDef]',
                    inputs: [
                        'when: cdkTreeNodeDefWhen'
                    ],
                },] },
    ];
    /** @nocollapse */
    CdkTreeNodeDef.ctorParameters = function () { return [
        { type: core.TemplateRef }
    ]; };
    return CdkTreeNodeDef;
}());

/**
 * @fileoverview added by tsickle
 * @suppress {checkTypes,extraRequire,missingReturn,unusedPrivateMembers,uselessCode} checked by tsc
 */
/**
 * Outlet for nested CdkNode. Put `[cdkTreeNodeOutlet]` on a tag to place children dataNodes
 * inside the outlet.
 */
var CdkTreeNodeOutlet = /** @class */ (function () {
    function CdkTreeNodeOutlet(viewContainer) {
        this.viewContainer = viewContainer;
    }
    CdkTreeNodeOutlet.decorators = [
        { type: core.Directive, args: [{
                    selector: '[cdkTreeNodeOutlet]'
                },] },
    ];
    /** @nocollapse */
    CdkTreeNodeOutlet.ctorParameters = function () { return [
        { type: core.ViewContainerRef }
    ]; };
    return CdkTreeNodeOutlet;
}());

/**
 * @fileoverview added by tsickle
 * @suppress {checkTypes,extraRequire,missingReturn,unusedPrivateMembers,uselessCode} checked by tsc
 */

/**
 * Returns an error to be thrown when there is no usable data.
 * \@docs-private
 * @return {?}
 */
function getTreeNoValidDataSourceError() {
    return Error("A valid data source must be provided.");
}
/**
 * Returns an error to be thrown when there are multiple nodes that are missing a when function.
 * \@docs-private
 * @return {?}
 */
function getTreeMultipleDefaultNodeDefsError() {
    return Error("There can only be one default row without a when predicate function.");
}
/**
 * Returns an error to be thrown when there are no matching node defs for a particular set of data.
 * \@docs-private
 * @return {?}
 */
function getTreeMissingMatchingNodeDefError() {
    return Error("Could not find a matching node definition for the provided node data.");
}
/**
 * Returns an error to be thrown when there are tree control.
 * \@docs-private
 * @return {?}
 */
function getTreeControlMissingError() {
    return Error("Could not find a tree control for the tree.");
}
/**
 * Returns an error to be thrown when tree control did not implement functions for flat/nested node.
 * \@docs-private
 * @return {?}
 */
function getTreeControlFunctionsMissingError() {
    return Error("Could not find functions for nested/flat tree in tree control.");
}

/**
 * @fileoverview added by tsickle
 * @suppress {checkTypes,extraRequire,missingReturn,unusedPrivateMembers,uselessCode} checked by tsc
 */
/**
 * CDK tree component that connects with a data source to retrieve data of type `T` and renders
 * dataNodes with hierarchy. Updates the dataNodes when new data is provided by the data source.
 * @template T
 */
var CdkTree = /** @class */ (function () {
    function CdkTree(_differs, _changeDetectorRef) {
        this._differs = _differs;
        this._changeDetectorRef = _changeDetectorRef;
        /**
         * Subject that emits when the component has been destroyed.
         */
        this._onDestroy = new rxjs.Subject();
        /**
         * Level of nodes
         */
        this._levels = new Map();
        // TODO(tinayuangao): Setup a listener for scrolling, emit the calculated view to viewChange.
        //     Remove the MAX_VALUE in viewChange
        /**
         * Stream containing the latest information on what rows are being displayed on screen.
         * Can be used by the data source to as a heuristic of what data should be provided.
         */
        this.viewChange = new rxjs.BehaviorSubject({ start: 0, end: Number.MAX_VALUE });
    }
    Object.defineProperty(CdkTree.prototype, "dataSource", {
        /**
         * Provides a stream containing the latest data array to render. Influenced by the tree's
         * stream of view window (what dataNodes are currently on screen).
         * Data source can be an observable of data array, or a data array to render.
         */
        get: /**
         * Provides a stream containing the latest data array to render. Influenced by the tree's
         * stream of view window (what dataNodes are currently on screen).
         * Data source can be an observable of data array, or a data array to render.
         * @return {?}
         */
        function () { return this._dataSource; },
        set: /**
         * @param {?} dataSource
         * @return {?}
         */
        function (dataSource) {
            if (this._dataSource !== dataSource) {
                this._switchDataSource(dataSource);
            }
        },
        enumerable: true,
        configurable: true
    });
    /**
     * @return {?}
     */
    CdkTree.prototype.ngOnInit = /**
     * @return {?}
     */
    function () {
        this._dataDiffer = this._differs.find([]).create(this.trackBy);
        if (!this.treeControl) {
            throw getTreeControlMissingError();
        }
    };
    /**
     * @return {?}
     */
    CdkTree.prototype.ngOnDestroy = /**
     * @return {?}
     */
    function () {
        this._nodeOutlet.viewContainer.clear();
        this._onDestroy.next();
        this._onDestroy.complete();
        if (this._dataSource && typeof ((/** @type {?} */ (this._dataSource))).disconnect === 'function') {
            ((/** @type {?} */ (this.dataSource))).disconnect(this);
        }
        if (this._dataSubscription) {
            this._dataSubscription.unsubscribe();
            this._dataSubscription = null;
        }
    };
    /**
     * @return {?}
     */
    CdkTree.prototype.ngAfterContentChecked = /**
     * @return {?}
     */
    function () {
        /** @type {?} */
        var defaultNodeDefs = this._nodeDefs.filter(function (def) { return !def.when; });
        if (defaultNodeDefs.length > 1) {
            throw getTreeMultipleDefaultNodeDefsError();
        }
        this._defaultNodeDef = defaultNodeDefs[0];
        if (this.dataSource && this._nodeDefs && !this._dataSubscription) {
            this._observeRenderChanges();
        }
    };
    // TODO(tinayuangao): Work on keyboard traversal and actions, make sure it's working for RTL
    //     and nested trees.
    /**
     * Switch to the provided data source by resetting the data and unsubscribing from the current
     * render change subscription if one exists. If the data source is null, interpret this by
     * clearing the node outlet. Otherwise start listening for new data.
     */
    // TODO(tinayuangao): Work on keyboard traversal and actions, make sure it's working for RTL
    //     and nested trees.
    /**
     * Switch to the provided data source by resetting the data and unsubscribing from the current
     * render change subscription if one exists. If the data source is null, interpret this by
     * clearing the node outlet. Otherwise start listening for new data.
     * @private
     * @param {?} dataSource
     * @return {?}
     */
    CdkTree.prototype._switchDataSource = 
    // TODO(tinayuangao): Work on keyboard traversal and actions, make sure it's working for RTL
    //     and nested trees.
    /**
     * Switch to the provided data source by resetting the data and unsubscribing from the current
     * render change subscription if one exists. If the data source is null, interpret this by
     * clearing the node outlet. Otherwise start listening for new data.
     * @private
     * @param {?} dataSource
     * @return {?}
     */
    function (dataSource) {
        if (this._dataSource && typeof ((/** @type {?} */ (this._dataSource))).disconnect === 'function') {
            ((/** @type {?} */ (this.dataSource))).disconnect(this);
        }
        if (this._dataSubscription) {
            this._dataSubscription.unsubscribe();
            this._dataSubscription = null;
        }
        // Remove the all dataNodes if there is now no data source
        if (!dataSource) {
            this._nodeOutlet.viewContainer.clear();
        }
        this._dataSource = dataSource;
        if (this._nodeDefs) {
            this._observeRenderChanges();
        }
    };
    /** Set up a subscription for the data provided by the data source. */
    /**
     * Set up a subscription for the data provided by the data source.
     * @private
     * @return {?}
     */
    CdkTree.prototype._observeRenderChanges = /**
     * Set up a subscription for the data provided by the data source.
     * @private
     * @return {?}
     */
    function () {
        var _this = this;
        /** @type {?} */
        var dataStream;
        // Cannot use `instanceof DataSource` since the data source could be a literal with
        // `connect` function and may not extends DataSource.
        if (typeof ((/** @type {?} */ (this._dataSource))).connect === 'function') {
            dataStream = ((/** @type {?} */ (this._dataSource))).connect(this);
        }
        else if (this._dataSource instanceof rxjs.Observable) {
            dataStream = this._dataSource;
        }
        else if (Array.isArray(this._dataSource)) {
            dataStream = rxjs.of(this._dataSource);
        }
        if (dataStream) {
            this._dataSubscription = dataStream.pipe(operators.takeUntil(this._onDestroy))
                .subscribe(function (data) { return _this.renderNodeChanges(data); });
        }
        else {
            throw getTreeNoValidDataSourceError();
        }
    };
    /** Check for changes made in the data and render each change (node added/removed/moved). */
    /**
     * Check for changes made in the data and render each change (node added/removed/moved).
     * @param {?} data
     * @param {?=} dataDiffer
     * @param {?=} viewContainer
     * @param {?=} parentData
     * @return {?}
     */
    CdkTree.prototype.renderNodeChanges = /**
     * Check for changes made in the data and render each change (node added/removed/moved).
     * @param {?} data
     * @param {?=} dataDiffer
     * @param {?=} viewContainer
     * @param {?=} parentData
     * @return {?}
     */
    function (data, dataDiffer, viewContainer, parentData) {
        var _this = this;
        if (dataDiffer === void 0) { dataDiffer = this._dataDiffer; }
        if (viewContainer === void 0) { viewContainer = this._nodeOutlet.viewContainer; }
        /** @type {?} */
        var changes = dataDiffer.diff(data);
        if (!changes) {
            return;
        }
        changes.forEachOperation(function (item, adjustedPreviousIndex, currentIndex) {
            if (item.previousIndex == null) {
                _this.insertNode(data[(/** @type {?} */ (currentIndex))], (/** @type {?} */ (currentIndex)), viewContainer, parentData);
            }
            else if (currentIndex == null) {
                viewContainer.remove((/** @type {?} */ (adjustedPreviousIndex)));
                _this._levels.delete(item.item);
            }
            else {
                /** @type {?} */
                var view = viewContainer.get((/** @type {?} */ (adjustedPreviousIndex)));
                viewContainer.move((/** @type {?} */ (view)), currentIndex);
            }
        });
        this._changeDetectorRef.detectChanges();
    };
    /**
     * Finds the matching node definition that should be used for this node data. If there is only
     * one node definition, it is returned. Otherwise, find the node definition that has a when
     * predicate that returns true with the data. If none return true, return the default node
     * definition.
     */
    /**
     * Finds the matching node definition that should be used for this node data. If there is only
     * one node definition, it is returned. Otherwise, find the node definition that has a when
     * predicate that returns true with the data. If none return true, return the default node
     * definition.
     * @param {?} data
     * @param {?} i
     * @return {?}
     */
    CdkTree.prototype._getNodeDef = /**
     * Finds the matching node definition that should be used for this node data. If there is only
     * one node definition, it is returned. Otherwise, find the node definition that has a when
     * predicate that returns true with the data. If none return true, return the default node
     * definition.
     * @param {?} data
     * @param {?} i
     * @return {?}
     */
    function (data, i) {
        if (this._nodeDefs.length === 1) {
            return this._nodeDefs.first;
        }
        /** @type {?} */
        var nodeDef = this._nodeDefs.find(function (def) { return def.when && def.when(i, data); }) || this._defaultNodeDef;
        if (!nodeDef) {
            throw getTreeMissingMatchingNodeDefError();
        }
        return nodeDef;
    };
    /**
     * Create the embedded view for the data node template and place it in the correct index location
     * within the data node view container.
     */
    /**
     * Create the embedded view for the data node template and place it in the correct index location
     * within the data node view container.
     * @param {?} nodeData
     * @param {?} index
     * @param {?=} viewContainer
     * @param {?=} parentData
     * @return {?}
     */
    CdkTree.prototype.insertNode = /**
     * Create the embedded view for the data node template and place it in the correct index location
     * within the data node view container.
     * @param {?} nodeData
     * @param {?} index
     * @param {?=} viewContainer
     * @param {?=} parentData
     * @return {?}
     */
    function (nodeData, index, viewContainer, parentData) {
        /** @type {?} */
        var node = this._getNodeDef(nodeData, index);
        // Node context that will be provided to created embedded view
        /** @type {?} */
        var context = new CdkTreeNodeOutletContext(nodeData);
        // If the tree is flat tree, then use the `getLevel` function in flat tree control
        // Otherwise, use the level of parent node.
        if (this.treeControl.getLevel) {
            context.level = this.treeControl.getLevel(nodeData);
        }
        else if (typeof parentData !== 'undefined' && this._levels.has(parentData)) {
            context.level = (/** @type {?} */ (this._levels.get(parentData))) + 1;
        }
        else {
            context.level = 0;
        }
        this._levels.set(nodeData, context.level);
        // Use default tree nodeOutlet, or nested node's nodeOutlet
        /** @type {?} */
        var container = viewContainer ? viewContainer : this._nodeOutlet.viewContainer;
        container.createEmbeddedView(node.template, context, index);
        // Set the data to just created `CdkTreeNode`.
        // The `CdkTreeNode` created from `createEmbeddedView` will be saved in static variable
        //     `mostRecentTreeNode`. We get it from static variable and pass the node data to it.
        if (CdkTreeNode.mostRecentTreeNode) {
            CdkTreeNode.mostRecentTreeNode.data = nodeData;
        }
    };
    CdkTree.decorators = [
        { type: core.Component, args: [{selector: 'cdk-tree',
                    exportAs: 'cdkTree',
                    template: "<ng-container cdkTreeNodeOutlet></ng-container>",
                    host: {
                        'class': 'cdk-tree',
                        'role': 'tree',
                    },
                    encapsulation: core.ViewEncapsulation.None,
                    changeDetection: core.ChangeDetectionStrategy.OnPush
                },] },
    ];
    /** @nocollapse */
    CdkTree.ctorParameters = function () { return [
        { type: core.IterableDiffers },
        { type: core.ChangeDetectorRef }
    ]; };
    CdkTree.propDecorators = {
        dataSource: [{ type: core.Input }],
        treeControl: [{ type: core.Input }],
        trackBy: [{ type: core.Input }],
        _nodeOutlet: [{ type: core.ViewChild, args: [CdkTreeNodeOutlet,] }],
        _nodeDefs: [{ type: core.ContentChildren, args: [CdkTreeNodeDef,] }]
    };
    return CdkTree;
}());
/**
 * Tree node for CdkTree. It contains the data in the tree node.
 * @template T
 */
var CdkTreeNode = /** @class */ (function () {
    function CdkTreeNode(_elementRef, _tree) {
        this._elementRef = _elementRef;
        this._tree = _tree;
        /**
         * Subject that emits when the component has been destroyed.
         */
        this._destroyed = new rxjs.Subject();
        /**
         * The role of the node should be 'group' if it's an internal node,
         * and 'treeitem' if it's a leaf node.
         */
        this.role = 'treeitem';
        CdkTreeNode.mostRecentTreeNode = (/** @type {?} */ (this));
    }
    Object.defineProperty(CdkTreeNode.prototype, "data", {
        /** The tree node's data. */
        get: /**
         * The tree node's data.
         * @return {?}
         */
        function () { return this._data; },
        set: /**
         * @param {?} value
         * @return {?}
         */
        function (value) {
            this._data = value;
            this._setRoleFromData();
        },
        enumerable: true,
        configurable: true
    });
    Object.defineProperty(CdkTreeNode.prototype, "isExpanded", {
        get: /**
         * @return {?}
         */
        function () {
            return this._tree.treeControl.isExpanded(this._data);
        },
        enumerable: true,
        configurable: true
    });
    Object.defineProperty(CdkTreeNode.prototype, "level", {
        get: /**
         * @return {?}
         */
        function () {
            return this._tree.treeControl.getLevel ? this._tree.treeControl.getLevel(this._data) : 0;
        },
        enumerable: true,
        configurable: true
    });
    /**
     * @return {?}
     */
    CdkTreeNode.prototype.ngOnDestroy = /**
     * @return {?}
     */
    function () {
        // If this is the last tree node being destroyed,
        // clear out the reference to avoid leaking memory.
        if (CdkTreeNode.mostRecentTreeNode === this) {
            CdkTreeNode.mostRecentTreeNode = null;
        }
        this._destroyed.next();
        this._destroyed.complete();
    };
    /** Focuses the menu item. Implements for FocusableOption. */
    /**
     * Focuses the menu item. Implements for FocusableOption.
     * @return {?}
     */
    CdkTreeNode.prototype.focus = /**
     * Focuses the menu item. Implements for FocusableOption.
     * @return {?}
     */
    function () {
        this._elementRef.nativeElement.focus();
    };
    /**
     * @protected
     * @return {?}
     */
    CdkTreeNode.prototype._setRoleFromData = /**
     * @protected
     * @return {?}
     */
    function () {
        var _this = this;
        if (this._tree.treeControl.isExpandable) {
            this.role = this._tree.treeControl.isExpandable(this._data) ? 'group' : 'treeitem';
        }
        else {
            if (!this._tree.treeControl.getChildren) {
                throw getTreeControlFunctionsMissingError();
            }
            /** @type {?} */
            var childrenNodes = this._tree.treeControl.getChildren(this._data);
            if (Array.isArray(childrenNodes)) {
                this._setRoleFromChildren((/** @type {?} */ (childrenNodes)));
            }
            else if (childrenNodes instanceof rxjs.Observable) {
                childrenNodes.pipe(operators.takeUntil(this._destroyed))
                    .subscribe(function (children) { return _this._setRoleFromChildren(children); });
            }
        }
    };
    /**
     * @protected
     * @param {?} children
     * @return {?}
     */
    CdkTreeNode.prototype._setRoleFromChildren = /**
     * @protected
     * @param {?} children
     * @return {?}
     */
    function (children) {
        this.role = children && children.length ? 'group' : 'treeitem';
    };
    /**
     * The most recently created `CdkTreeNode`. We save it in static variable so we can retrieve it
     * in `CdkTree` and set the data to it.
     */
    CdkTreeNode.mostRecentTreeNode = null;
    CdkTreeNode.decorators = [
        { type: core.Directive, args: [{
                    selector: 'cdk-tree-node',
                    exportAs: 'cdkTreeNode',
                    host: {
                        '[attr.aria-expanded]': 'isExpanded',
                        '[attr.aria-level]': 'role === "treeitem" ? level : null',
                        '[attr.role]': 'role',
                        'class': 'cdk-tree-node',
                    },
                },] },
    ];
    /** @nocollapse */
    CdkTreeNode.ctorParameters = function () { return [
        { type: core.ElementRef },
        { type: CdkTree }
    ]; };
    CdkTreeNode.propDecorators = {
        role: [{ type: core.Input }]
    };
    return CdkTreeNode;
}());

/**
 * @fileoverview added by tsickle
 * @suppress {checkTypes,extraRequire,missingReturn,unusedPrivateMembers,uselessCode} checked by tsc
 */
/**
 * Nested node is a child of `<cdk-tree>`. It works with nested tree.
 * By using `cdk-nested-tree-node` component in tree node template, children of the parent node will
 * be added in the `cdkTreeNodeOutlet` in tree node template.
 * For example:
 *   ```html
 *   <cdk-nested-tree-node>
 *     {{node.name}}
 *     <ng-template cdkTreeNodeOutlet></ng-template>
 *   </cdk-nested-tree-node>
 *   ```
 * The children of node will be automatically added to `cdkTreeNodeOutlet`, the result dom will be
 * like this:
 *   ```html
 *   <cdk-nested-tree-node>
 *     {{node.name}}
 *      <cdk-nested-tree-node>{{child1.name}}</cdk-nested-tree-node>
 *      <cdk-nested-tree-node>{{child2.name}}</cdk-nested-tree-node>
 *   </cdk-nested-tree-node>
 *   ```
 * @template T
 */
var CdkNestedTreeNode = /** @class */ (function (_super) {
    __extends(CdkNestedTreeNode, _super);
    function CdkNestedTreeNode(_elementRef, _tree, _differs) {
        var _this = _super.call(this, _elementRef, _tree) || this;
        _this._elementRef = _elementRef;
        _this._tree = _tree;
        _this._differs = _differs;
        return _this;
    }
    /**
     * @return {?}
     */
    CdkNestedTreeNode.prototype.ngAfterContentInit = /**
     * @return {?}
     */
    function () {
        var _this = this;
        this._dataDiffer = this._differs.find([]).create(this._tree.trackBy);
        if (!this._tree.treeControl.getChildren) {
            throw getTreeControlFunctionsMissingError();
        }
        /** @type {?} */
        var childrenNodes = this._tree.treeControl.getChildren(this.data);
        if (Array.isArray(childrenNodes)) {
            this.updateChildrenNodes((/** @type {?} */ (childrenNodes)));
        }
        else if (childrenNodes instanceof rxjs.Observable) {
            childrenNodes.pipe(operators.takeUntil(this._destroyed))
                .subscribe(function (result) { return _this.updateChildrenNodes(result); });
        }
        this.nodeOutlet.changes.pipe(operators.takeUntil(this._destroyed))
            .subscribe(function () { return _this.updateChildrenNodes(); });
    };
    /**
     * @return {?}
     */
    CdkNestedTreeNode.prototype.ngOnDestroy = /**
     * @return {?}
     */
    function () {
        this._clear();
        _super.prototype.ngOnDestroy.call(this);
    };
    /** Add children dataNodes to the NodeOutlet */
    /**
     * Add children dataNodes to the NodeOutlet
     * @protected
     * @param {?=} children
     * @return {?}
     */
    CdkNestedTreeNode.prototype.updateChildrenNodes = /**
     * Add children dataNodes to the NodeOutlet
     * @protected
     * @param {?=} children
     * @return {?}
     */
    function (children) {
        if (children) {
            this._children = children;
        }
        if (this.nodeOutlet.length && this._children) {
            /** @type {?} */
            var viewContainer = this.nodeOutlet.first.viewContainer;
            this._tree.renderNodeChanges(this._children, this._dataDiffer, viewContainer, this._data);
        }
        else {
            // Reset the data differ if there's no children nodes displayed
            this._dataDiffer.diff([]);
        }
    };
    /** Clear the children dataNodes. */
    /**
     * Clear the children dataNodes.
     * @protected
     * @return {?}
     */
    CdkNestedTreeNode.prototype._clear = /**
     * Clear the children dataNodes.
     * @protected
     * @return {?}
     */
    function () {
        if (this.nodeOutlet && this.nodeOutlet.first) {
            this.nodeOutlet.first.viewContainer.clear();
            this._dataDiffer.diff([]);
        }
    };
    CdkNestedTreeNode.decorators = [
        { type: core.Directive, args: [{
                    selector: 'cdk-nested-tree-node',
                    exportAs: 'cdkNestedTreeNode',
                    host: {
                        '[attr.aria-expanded]': 'isExpanded',
                        '[attr.role]': 'role',
                        'class': 'cdk-tree-node cdk-nested-tree-node',
                    },
                    providers: [{ provide: CdkTreeNode, useExisting: CdkNestedTreeNode }]
                },] },
    ];
    /** @nocollapse */
    CdkNestedTreeNode.ctorParameters = function () { return [
        { type: core.ElementRef },
        { type: CdkTree },
        { type: core.IterableDiffers }
    ]; };
    CdkNestedTreeNode.propDecorators = {
        nodeOutlet: [{ type: core.ContentChildren, args: [CdkTreeNodeOutlet,] }]
    };
    return CdkNestedTreeNode;
}(CdkTreeNode));

/**
 * @fileoverview added by tsickle
 * @suppress {checkTypes,extraRequire,missingReturn,unusedPrivateMembers,uselessCode} checked by tsc
 */
/**
 * Regex used to split a string on its CSS units.
 * @type {?}
 */
var cssUnitPattern = /([A-Za-z%]+)$/;
/**
 * Indent for the children tree dataNodes.
 * This directive will add left-padding to the node to show hierarchy.
 * @template T
 */
var CdkTreeNodePadding = /** @class */ (function () {
    function CdkTreeNodePadding(_treeNode, _tree, _renderer, _element, _dir) {
        var _this = this;
        this._treeNode = _treeNode;
        this._tree = _tree;
        this._renderer = _renderer;
        this._element = _element;
        this._dir = _dir;
        /**
         * Subject that emits when the component has been destroyed.
         */
        this._destroyed = new rxjs.Subject();
        /**
         * CSS units used for the indentation value.
         */
        this.indentUnits = 'px';
        this._indent = 40;
        this._setPadding();
        if (this._dir) {
            this._dir.change.pipe(operators.takeUntil(this._destroyed)).subscribe(function () { return _this._setPadding(); });
        }
    }
    Object.defineProperty(CdkTreeNodePadding.prototype, "level", {
        /** The level of depth of the tree node. The padding will be `level * indent` pixels. */
        get: /**
         * The level of depth of the tree node. The padding will be `level * indent` pixels.
         * @return {?}
         */
        function () { return this._level; },
        set: /**
         * @param {?} value
         * @return {?}
         */
        function (value) {
            this._level = coercion.coerceNumberProperty(value);
            this._setPadding();
        },
        enumerable: true,
        configurable: true
    });
    Object.defineProperty(CdkTreeNodePadding.prototype, "indent", {
        /**
         * The indent for each level. Can be a number or a CSS string.
         * Default number 40px from material design menu sub-menu spec.
         */
        get: /**
         * The indent for each level. Can be a number or a CSS string.
         * Default number 40px from material design menu sub-menu spec.
         * @return {?}
         */
        function () { return this._indent; },
        set: /**
         * @param {?} indent
         * @return {?}
         */
        function (indent) {
            /** @type {?} */
            var value = indent;
            /** @type {?} */
            var units = 'px';
            if (typeof indent === 'string') {
                /** @type {?} */
                var parts = indent.split(cssUnitPattern);
                value = parts[0];
                units = parts[1] || units;
            }
            this.indentUnits = units;
            this._indent = coercion.coerceNumberProperty(value);
            this._setPadding();
        },
        enumerable: true,
        configurable: true
    });
    /**
     * @return {?}
     */
    CdkTreeNodePadding.prototype.ngOnDestroy = /**
     * @return {?}
     */
    function () {
        this._destroyed.next();
        this._destroyed.complete();
    };
    /** The padding indent value for the tree node. Returns a string with px numbers if not null. */
    /**
     * The padding indent value for the tree node. Returns a string with px numbers if not null.
     * @return {?}
     */
    CdkTreeNodePadding.prototype._paddingIndent = /**
     * The padding indent value for the tree node. Returns a string with px numbers if not null.
     * @return {?}
     */
    function () {
        /** @type {?} */
        var nodeLevel = (this._treeNode.data && this._tree.treeControl.getLevel)
            ? this._tree.treeControl.getLevel(this._treeNode.data)
            : null;
        /** @type {?} */
        var level = this._level || nodeLevel;
        return level ? "" + level * this._indent + this.indentUnits : null;
    };
    /**
     * @return {?}
     */
    CdkTreeNodePadding.prototype._setPadding = /**
     * @return {?}
     */
    function () {
        /** @type {?} */
        var padding = this._paddingIndent();
        /** @type {?} */
        var paddingProp = this._dir && this._dir.value === 'rtl' ? 'paddingRight' : 'paddingLeft';
        this._renderer.setStyle(this._element.nativeElement, paddingProp, padding);
    };
    CdkTreeNodePadding.decorators = [
        { type: core.Directive, args: [{
                    selector: '[cdkTreeNodePadding]',
                },] },
    ];
    /** @nocollapse */
    CdkTreeNodePadding.ctorParameters = function () { return [
        { type: CdkTreeNode },
        { type: CdkTree },
        { type: core.Renderer2 },
        { type: core.ElementRef },
        { type: bidi.Directionality, decorators: [{ type: core.Optional }] }
    ]; };
    CdkTreeNodePadding.propDecorators = {
        level: [{ type: core.Input, args: ['cdkTreeNodePadding',] }],
        indent: [{ type: core.Input, args: ['cdkTreeNodePaddingIndent',] }]
    };
    return CdkTreeNodePadding;
}());

/**
 * @fileoverview added by tsickle
 * @suppress {checkTypes,extraRequire,missingReturn,unusedPrivateMembers,uselessCode} checked by tsc
 */
/**
 * Node toggle to expand/collapse the node.
 * @template T
 */
var CdkTreeNodeToggle = /** @class */ (function () {
    function CdkTreeNodeToggle(_tree, _treeNode) {
        this._tree = _tree;
        this._treeNode = _treeNode;
        this._recursive = false;
    }
    Object.defineProperty(CdkTreeNodeToggle.prototype, "recursive", {
        /** Whether expand/collapse the node recursively. */
        get: /**
         * Whether expand/collapse the node recursively.
         * @return {?}
         */
        function () { return this._recursive; },
        set: /**
         * @param {?} value
         * @return {?}
         */
        function (value) { this._recursive = coercion.coerceBooleanProperty(value); },
        enumerable: true,
        configurable: true
    });
    /**
     * @param {?} event
     * @return {?}
     */
    CdkTreeNodeToggle.prototype._toggle = /**
     * @param {?} event
     * @return {?}
     */
    function (event) {
        this.recursive
            ? this._tree.treeControl.toggleDescendants(this._treeNode.data)
            : this._tree.treeControl.toggle(this._treeNode.data);
        event.stopPropagation();
    };
    CdkTreeNodeToggle.decorators = [
        { type: core.Directive, args: [{
                    selector: '[cdkTreeNodeToggle]',
                    host: {
                        '(click)': '_toggle($event)',
                    }
                },] },
    ];
    /** @nocollapse */
    CdkTreeNodeToggle.ctorParameters = function () { return [
        { type: CdkTree },
        { type: CdkTreeNode }
    ]; };
    CdkTreeNodeToggle.propDecorators = {
        recursive: [{ type: core.Input, args: ['cdkTreeNodeToggleRecursive',] }]
    };
    return CdkTreeNodeToggle;
}());

/**
 * @fileoverview added by tsickle
 * @suppress {checkTypes,extraRequire,missingReturn,unusedPrivateMembers,uselessCode} checked by tsc
 */
/** @type {?} */
var EXPORTED_DECLARATIONS = [
    CdkNestedTreeNode,
    CdkTreeNodeDef,
    CdkTreeNodePadding,
    CdkTreeNodeToggle,
    CdkTree,
    CdkTreeNode,
    CdkTreeNodeOutlet,
];
var CdkTreeModule = /** @class */ (function () {
    function CdkTreeModule() {
    }
    CdkTreeModule.decorators = [
        { type: core.NgModule, args: [{
                    imports: [common.CommonModule],
                    exports: EXPORTED_DECLARATIONS,
                    declarations: EXPORTED_DECLARATIONS,
                    providers: [a11y.FocusMonitor, CdkTreeNodeDef]
                },] },
    ];
    return CdkTreeModule;
}());

exports.BaseTreeControl = BaseTreeControl;
exports.FlatTreeControl = FlatTreeControl;
exports.NestedTreeControl = NestedTreeControl;
exports.CdkNestedTreeNode = CdkNestedTreeNode;
exports.CdkTreeNodeOutletContext = CdkTreeNodeOutletContext;
exports.CdkTreeNodeDef = CdkTreeNodeDef;
exports.CdkTreeNodePadding = CdkTreeNodePadding;
exports.CdkTreeNodeOutlet = CdkTreeNodeOutlet;
exports.CdkTree = CdkTree;
exports.CdkTreeNode = CdkTreeNode;
exports.getTreeNoValidDataSourceError = getTreeNoValidDataSourceError;
exports.getTreeMultipleDefaultNodeDefsError = getTreeMultipleDefaultNodeDefsError;
exports.getTreeMissingMatchingNodeDefError = getTreeMissingMatchingNodeDefError;
exports.getTreeControlMissingError = getTreeControlMissingError;
exports.getTreeControlFunctionsMissingError = getTreeControlFunctionsMissingError;
exports.CdkTreeModule = CdkTreeModule;
exports.CdkTreeNodeToggle = CdkTreeNodeToggle;

Object.defineProperty(exports, '__esModule', { value: true });

})));
//# sourceMappingURL=cdk-tree.umd.js.map
