source: trip-planner-front/node_modules/@angular/cdk/esm2015/tree/control/base-tree-control.js@ b738035

/**
 * @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 { SelectionModel } from '@angular/cdk/collections';
/** Base tree control. It has basic toggle/expand/collapse operations on a single data node. */
export class BaseTreeControl {
    constructor() {
        /** A selection model with multi-selection to track expansion status. */
        this.expansionModel = new SelectionModel(true);
    }
    /** Toggles one single data node's expanded/collapsed state. */
    toggle(dataNode) {
        this.expansionModel.toggle(this._trackByValue(dataNode));
    }
    /** Expands one single data node. */
    expand(dataNode) {
        this.expansionModel.select(this._trackByValue(dataNode));
    }
    /** Collapses one single data node. */
    collapse(dataNode) {
        this.expansionModel.deselect(this._trackByValue(dataNode));
    }
    /** Whether a given data node is expanded or not. Returns true if the data node is expanded. */
    isExpanded(dataNode) {
        return this.expansionModel.isSelected(this._trackByValue(dataNode));
    }
    /** Toggles a subtree rooted at `node` recursively. */
    toggleDescendants(dataNode) {
        this.expansionModel.isSelected(this._trackByValue(dataNode)) ?
            this.collapseDescendants(dataNode) :
            this.expandDescendants(dataNode);
    }
    /** Collapse all dataNodes in the tree. */
    collapseAll() {
        this.expansionModel.clear();
    }
    /** Expands a subtree rooted at given data node recursively. */
    expandDescendants(dataNode) {
        let toBeProcessed = [dataNode];
        toBeProcessed.push(...this.getDescendants(dataNode));
        this.expansionModel.select(...toBeProcessed.map(value => this._trackByValue(value)));
    }
    /** Collapses a subtree rooted at given data node recursively. */
    collapseDescendants(dataNode) {
        let toBeProcessed = [dataNode];
        toBeProcessed.push(...this.getDescendants(dataNode));
        this.expansionModel.deselect(...toBeProcessed.map(value => this._trackByValue(value)));
    }
    _trackByValue(value) {
        return this.trackBy ? this.trackBy(value) : value;
    }
}
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