| 1 | /**
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| 2 | * @license
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| 3 | * Copyright Google LLC All Rights Reserved.
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| 4 | *
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| 5 | * Use of this source code is governed by an MIT-style license that can be
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| 6 | * found in the LICENSE file at https://angular.io/license
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| 7 | */
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| 8 | import { DOCUMENT, ɵgetDOM as getDOM } from '@angular/common';
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| 9 | import { Inject, Injectable } from '@angular/core';
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| 10 | import * as i0 from "@angular/core";
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| 11 | export class SharedStylesHost {
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| 12 | constructor() {
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| 13 | /** @internal */
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| 14 | this._stylesSet = new Set();
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| 15 | }
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| 16 | addStyles(styles) {
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| 17 | const additions = new Set();
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| 18 | styles.forEach(style => {
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| 19 | if (!this._stylesSet.has(style)) {
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| 20 | this._stylesSet.add(style);
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| 21 | additions.add(style);
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| 22 | }
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| 23 | });
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| 24 | this.onStylesAdded(additions);
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| 25 | }
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| 26 | onStylesAdded(additions) { }
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| 27 | getAllStyles() {
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| 28 | return Array.from(this._stylesSet);
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| 29 | }
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| 30 | }
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| 31 | SharedStylesHost.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "13.0.3", ngImport: i0, type: SharedStylesHost, deps: [], target: i0.ɵɵFactoryTarget.Injectable });
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| 32 | SharedStylesHost.ɵprov = i0.ɵɵngDeclareInjectable({ minVersion: "12.0.0", version: "13.0.3", ngImport: i0, type: SharedStylesHost });
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| 33 | i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "13.0.3", ngImport: i0, type: SharedStylesHost, decorators: [{
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| 34 | type: Injectable
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| 35 | }] });
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| 36 | export class DomSharedStylesHost extends SharedStylesHost {
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| 37 | constructor(_doc) {
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| 38 | super();
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| 39 | this._doc = _doc;
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| 40 | // Maps all registered host nodes to a list of style nodes that have been added to the host node.
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| 41 | this._hostNodes = new Map();
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| 42 | this._hostNodes.set(_doc.head, []);
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| 43 | }
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| 44 | _addStylesToHost(styles, host, styleNodes) {
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| 45 | styles.forEach((style) => {
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| 46 | const styleEl = this._doc.createElement('style');
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| 47 | styleEl.textContent = style;
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| 48 | styleNodes.push(host.appendChild(styleEl));
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| 49 | });
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| 50 | }
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| 51 | addHost(hostNode) {
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| 52 | const styleNodes = [];
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| 53 | this._addStylesToHost(this._stylesSet, hostNode, styleNodes);
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| 54 | this._hostNodes.set(hostNode, styleNodes);
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| 55 | }
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| 56 | removeHost(hostNode) {
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| 57 | const styleNodes = this._hostNodes.get(hostNode);
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| 58 | if (styleNodes) {
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| 59 | styleNodes.forEach(removeStyle);
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| 60 | }
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| 61 | this._hostNodes.delete(hostNode);
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| 62 | }
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| 63 | onStylesAdded(additions) {
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| 64 | this._hostNodes.forEach((styleNodes, hostNode) => {
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| 65 | this._addStylesToHost(additions, hostNode, styleNodes);
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| 66 | });
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| 67 | }
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| 68 | ngOnDestroy() {
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| 69 | this._hostNodes.forEach(styleNodes => styleNodes.forEach(removeStyle));
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| 70 | }
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| 71 | }
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| 72 | DomSharedStylesHost.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "13.0.3", ngImport: i0, type: DomSharedStylesHost, deps: [{ token: DOCUMENT }], target: i0.ɵɵFactoryTarget.Injectable });
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| 73 | DomSharedStylesHost.ɵprov = i0.ɵɵngDeclareInjectable({ minVersion: "12.0.0", version: "13.0.3", ngImport: i0, type: DomSharedStylesHost });
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| 74 | i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "13.0.3", ngImport: i0, type: DomSharedStylesHost, decorators: [{
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| 75 | type: Injectable
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| 76 | }], ctorParameters: function () { return [{ type: undefined, decorators: [{
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| 77 | type: Inject,
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| 78 | args: [DOCUMENT]
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| 79 | }] }]; } });
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| 80 | function removeStyle(styleNode) {
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| 81 | getDOM().remove(styleNode);
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| 82 | }
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| 83 | //# 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