feat(aio): hide search results when click outside search elements

Clicking anywhere except on the search results and the search box will
now hide the search results

Closes #15095

aio/src/app/app.component.html

@@ -1,7 +1,7 @@
 <md-toolbar color="primary" class="app-toolbar">
   <button *ngIf="isHamburgerVisible" class="hamburger" md-button (click)="sidenav.toggle()"><md-icon>menu</md-icon></button>
   <aio-top-menu *ngIf="isSideBySide" [nodes]="(navigationViews | async)?.TopBar" [homeImageUrl]="homeImageUrl"></aio-top-menu>
-  <aio-search-box></aio-search-box>
+  <aio-search-box #searchBox></aio-search-box>
   <span class="fill-remaining-space"></span>
 </md-toolbar>
 
@@ -13,7 +13,7 @@
   </md-sidenav>
 
   <section class="sidenav-content">
-    <aio-search-results></aio-search-results>
+    <aio-search-results #searchResults></aio-search-results>
     <aio-doc-viewer [doc]="currentDocument | async"></aio-doc-viewer>
   </section>
 

aio/src/app/app.component.spec.ts

@@ -1,9 +1,12 @@
 import { async, inject, ComponentFixture, TestBed } from '@angular/core/testing';
 import { APP_BASE_HREF } from '@angular/common';
+import { By } from '@angular/platform-browser';
 import { AppComponent } from './app.component';
 import { AppModule } from './app.module';
 import { GaService } from 'app/shared/ga.service';
 import { SearchService } from 'app/search/search.service';
+import { SearchResultsComponent } from 'app/search/search-results/search-results.component';
+import { SearchBoxComponent } from 'app/search/search-box/search-box.component';
 import { MockSearchService } from 'testing/search.service';
 import { LocationService } from 'app/shared/location.service';
 import { MockLocationService } from 'testing/location.service';
@@ -84,6 +87,27 @@ describe('AppComponent', () => {
       anchorElement.click();
       expect(location.handleAnchorClick).toHaveBeenCalledWith(anchorElement, 0, false, false);
     }));
+
+    it('should intercept clicks not on the search elements and hide the search results', () => {
+      const searchResults: SearchResultsComponent = fixture.debugElement.query(By.directive(SearchResultsComponent)).componentInstance;
+      const docViewer = fixture.debugElement.query(By.css('aio-doc-viewer'));
+      spyOn(searchResults, 'hideResults');
+      docViewer.nativeElement.click();
+      expect(searchResults.hideResults).toHaveBeenCalled();
+    });
+
+    it('should not intercept clicks on any of the search elements', () => {
+      const searchResults = fixture.debugElement.query(By.directive(SearchResultsComponent));
+      const searchResultsComponent: SearchResultsComponent = searchResults.componentInstance;
+      const searchBox = fixture.debugElement.query(By.directive(SearchBoxComponent));
+      spyOn(searchResultsComponent, 'hideResults');
+
+      searchResults.nativeElement.click();
+      expect(searchResultsComponent.hideResults).not.toHaveBeenCalled();
+
+      searchBox.nativeElement.click();
+      expect(searchResultsComponent.hideResults).not.toHaveBeenCalled();
+    });
   });
 });
 

aio/src/app/app.component.ts

@@ -1,4 +1,4 @@
-import { Component, HostListener, ViewChild, OnInit } from '@angular/core';
+import { Component, ElementRef, HostListener, OnInit, QueryList, ViewChild, ViewChildren } from '@angular/core';
 import { Observable } from 'rxjs/Observable';
 
 import { GaService } from 'app/shared/ga.service';
@@ -6,6 +6,7 @@ import { LocationService } from 'app/shared/location.service';
 import { DocumentService, DocumentContents } from 'app/documents/document.service';
 import { NavigationService, NavigationViews, NavigationNode } from 'app/navigation/navigation.service';
 import { SearchService } from 'app/search/search.service';
+import { SearchResultsComponent } from 'app/search/search-results/search-results.component';
 
 @Component({
   selector: 'aio-shell',
@@ -23,13 +24,18 @@ export class AppComponent implements OnInit {
   navigationViews: Observable<NavigationViews>;
   selectedNodes: Observable<NavigationNode[]>;
 
+  @ViewChildren('searchBox, searchResults', { read: ElementRef })
+  searchElements: QueryList<ElementRef>;
+
+  @ViewChild(SearchResultsComponent)
+  searchResults: SearchResultsComponent;
+
   constructor(
       documentService: DocumentService,
       gaService: GaService,
       private locationService: LocationService,
       navigationService: NavigationService,
       private searchService: SearchService) {
-
     this.currentDocument = documentService.currentDocument;
     locationService.currentUrl.subscribe(url => gaService.locationChanged(url));
     this.navigationViews = navigationService.navigationViews;
@@ -50,6 +56,16 @@ export class AppComponent implements OnInit {
 
   @HostListener('click', ['$event.target', '$event.button', '$event.ctrlKey', '$event.metaKey'])
   onClick(eventTarget: HTMLElement, button: number, ctrlKey: boolean, metaKey: boolean): boolean {
+
+    // Hide the search results if we clicked outside both the search box and the search results
+    if (this.searchResults) {
+      const hits = this.searchElements.filter(element => element.nativeElement.contains(eventTarget));
+      if (hits.length === 0) {
+        this.searchResults.hideResults();
+      }
+    }
+
+    // Deal with anchor clicks
     if (eventTarget instanceof HTMLAnchorElement) {
       return this.locationService.handleAnchorClick(eventTarget, button, ctrlKey, metaKey);
     }