source: trip-planner-front/node_modules/@angular/platform-browser/esm2015/src/dom/shared_styles_host.js@ 6a3a178

/**
 * @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 { DOCUMENT, ɵgetDOM as getDOM } from '@angular/common';
import { Inject, Injectable } from '@angular/core';
export class SharedStylesHost {
    constructor() {
        /** @internal */
        this._stylesSet = new Set();
    }
    addStyles(styles) {
        const additions = new Set();
        styles.forEach(style => {
            if (!this._stylesSet.has(style)) {
                this._stylesSet.add(style);
                additions.add(style);
            }
        });
        this.onStylesAdded(additions);
    }
    onStylesAdded(additions) { }
    getAllStyles() {
        return Array.from(this._stylesSet);
    }
}
SharedStylesHost.decorators = [
    { type: Injectable }
];
export class DomSharedStylesHost extends SharedStylesHost {
    constructor(_doc) {
        super();
        this._doc = _doc;
        // Maps all registered host nodes to a list of style nodes that have been added to the host node.
        this._hostNodes = new Map();
        this._hostNodes.set(_doc.head, []);
    }
    _addStylesToHost(styles, host, styleNodes) {
        styles.forEach((style) => {
            const styleEl = this._doc.createElement('style');
            styleEl.textContent = style;
            styleNodes.push(host.appendChild(styleEl));
        });
    }
    addHost(hostNode) {
        const styleNodes = [];
        this._addStylesToHost(this._stylesSet, hostNode, styleNodes);
        this._hostNodes.set(hostNode, styleNodes);
    }
    removeHost(hostNode) {
        const styleNodes = this._hostNodes.get(hostNode);
        if (styleNodes) {
            styleNodes.forEach(removeStyle);
        }
        this._hostNodes.delete(hostNode);
    }
    onStylesAdded(additions) {
        this._hostNodes.forEach((styleNodes, hostNode) => {
            this._addStylesToHost(additions, hostNode, styleNodes);
        });
    }
    ngOnDestroy() {
        this._hostNodes.forEach(styleNodes => styleNodes.forEach(removeStyle));
    }
}
DomSharedStylesHost.decorators = [
    { type: Injectable }
];
DomSharedStylesHost.ctorParameters = () => [
    { type: undefined, decorators: [{ type: Inject, args: [DOCUMENT,] }] }
];
function removeStyle(styleNode) {
    getDOM().remove(styleNode);
}
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