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 | /**
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9 | * Store contextual information about a `RouterOutlet`
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10 | *
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11 | * @publicApi
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12 | */
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13 | export class OutletContext {
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14 | constructor() {
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15 | this.outlet = null;
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16 | this.route = null;
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17 | this.resolver = null;
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18 | this.children = new ChildrenOutletContexts();
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19 | this.attachRef = null;
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20 | }
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21 | }
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22 | /**
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23 | * Store contextual information about the children (= nested) `RouterOutlet`
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24 | *
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25 | * @publicApi
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26 | */
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27 | export class ChildrenOutletContexts {
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28 | constructor() {
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29 | // contexts for child outlets, by name.
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30 | this.contexts = new Map();
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31 | }
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32 | /** Called when a `RouterOutlet` directive is instantiated */
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33 | onChildOutletCreated(childName, outlet) {
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34 | const context = this.getOrCreateContext(childName);
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35 | context.outlet = outlet;
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36 | this.contexts.set(childName, context);
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37 | }
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38 | /**
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39 | * Called when a `RouterOutlet` directive is destroyed.
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40 | * We need to keep the context as the outlet could be destroyed inside a NgIf and might be
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41 | * re-created later.
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42 | */
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43 | onChildOutletDestroyed(childName) {
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44 | const context = this.getContext(childName);
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45 | if (context) {
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46 | context.outlet = null;
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47 | context.attachRef = null;
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48 | }
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49 | }
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50 | /**
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51 | * Called when the corresponding route is deactivated during navigation.
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52 | * Because the component get destroyed, all children outlet are destroyed.
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53 | */
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54 | onOutletDeactivated() {
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55 | const contexts = this.contexts;
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56 | this.contexts = new Map();
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57 | return contexts;
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58 | }
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59 | onOutletReAttached(contexts) {
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60 | this.contexts = contexts;
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61 | }
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62 | getOrCreateContext(childName) {
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63 | let context = this.getContext(childName);
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64 | if (!context) {
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65 | context = new OutletContext();
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66 | this.contexts.set(childName, context);
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67 | }
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68 | return context;
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69 | }
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70 | getContext(childName) {
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71 | return this.contexts.get(childName) || null;
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72 | }
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73 | }
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74 | //# 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