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 | export class SharedStylesHost {
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11 | constructor() {
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12 | /** @internal */
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13 | this._stylesSet = new Set();
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14 | }
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15 | addStyles(styles) {
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16 | const additions = new Set();
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17 | styles.forEach(style => {
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18 | if (!this._stylesSet.has(style)) {
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19 | this._stylesSet.add(style);
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20 | additions.add(style);
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21 | }
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22 | });
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23 | this.onStylesAdded(additions);
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24 | }
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25 | onStylesAdded(additions) { }
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26 | getAllStyles() {
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27 | return Array.from(this._stylesSet);
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28 | }
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29 | }
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30 | SharedStylesHost.decorators = [
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31 | { type: Injectable }
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32 | ];
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33 | export class DomSharedStylesHost extends SharedStylesHost {
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34 | constructor(_doc) {
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35 | super();
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36 | this._doc = _doc;
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37 | // Maps all registered host nodes to a list of style nodes that have been added to the host node.
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38 | this._hostNodes = new Map();
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39 | this._hostNodes.set(_doc.head, []);
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40 | }
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41 | _addStylesToHost(styles, host, styleNodes) {
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42 | styles.forEach((style) => {
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43 | const styleEl = this._doc.createElement('style');
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44 | styleEl.textContent = style;
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45 | styleNodes.push(host.appendChild(styleEl));
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46 | });
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47 | }
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48 | addHost(hostNode) {
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49 | const styleNodes = [];
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50 | this._addStylesToHost(this._stylesSet, hostNode, styleNodes);
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51 | this._hostNodes.set(hostNode, styleNodes);
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52 | }
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53 | removeHost(hostNode) {
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54 | const styleNodes = this._hostNodes.get(hostNode);
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55 | if (styleNodes) {
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56 | styleNodes.forEach(removeStyle);
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57 | }
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58 | this._hostNodes.delete(hostNode);
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59 | }
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60 | onStylesAdded(additions) {
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61 | this._hostNodes.forEach((styleNodes, hostNode) => {
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62 | this._addStylesToHost(additions, hostNode, styleNodes);
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63 | });
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64 | }
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65 | ngOnDestroy() {
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66 | this._hostNodes.forEach(styleNodes => styleNodes.forEach(removeStyle));
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67 | }
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68 | }
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69 | DomSharedStylesHost.decorators = [
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70 | { type: Injectable }
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71 | ];
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72 | DomSharedStylesHost.ctorParameters = () => [
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73 | { type: undefined, decorators: [{ type: Inject, args: [DOCUMENT,] }] }
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74 | ];
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75 | function removeStyle(styleNode) {
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76 | getDOM().remove(styleNode);
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77 | }
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78 | //# 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