[AAE-534] Core - add search cloud component (#5193)

* [AAE-534] - add search cloud component

* change doc file

* more changes on doc file

* remove empty scss file

* add animation and more customizations

* add preselect value property

* fix unit tests

lib/core/search-cloud/components/search-text-cloud/search-text-cloud.component.ts

@@ -0,0 +1,69 @@
+/*!
+ * @license
+ * Copyright 2019 Alfresco Software, Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import { ViewEncapsulation, Component, ViewChild, ElementRef, Renderer2, OnInit } from '@angular/core';
+import { Subject } from 'rxjs';
+import { SearchCloudService } from '../../../services/search-cloud.service';
+import { SearchCloudProperties, SearchCloudWidget } from '../../../models/search-cloud.model';
+
+@Component({
+    selector: 'adf-search-text-cloud',
+    templateUrl: './search-text-cloud.component.html',
+    encapsulation: ViewEncapsulation.None
+})
+export class SearchTextCloudComponent implements OnInit, SearchCloudWidget {
+
+    @ViewChild('searchContainer')
+    searchInput: ElementRef;
+
+    properties: SearchCloudProperties = {};
+    onDestroy$: Subject<void> = new Subject<void>();
+
+    expandedClass = 'app-field-expanded';
+
+    constructor(
+        private searchCloudService: SearchCloudService,
+        private renderer: Renderer2) {}
+
+    ngOnInit() {
+        if (!this.isExpandable()) {
+            this.renderer.addClass(this.searchInput.nativeElement, this.expandedClass);
+        }
+    }
+
+    onChangedHandler(event) {
+        this.searchCloudService.value.next(event.target.value);
+    }
+
+    toggle() {
+        if (!this.isExpandable()) { return; }
+
+        if (this.searchInput.nativeElement && this.searchInput.nativeElement.classList.contains(this.expandedClass)) {
+            this.renderer.removeClass(this.searchInput.nativeElement, this.expandedClass);
+        } else {
+            this.renderer.addClass(this.searchInput.nativeElement, this.expandedClass);
+        }
+    }
+
+    private isExpandable() {
+        return this.properties && this.properties.expandable;
+    }
+
+    clear() {
+        this.properties.value = '';
+    }
+}