[ADF-1038] - Dropddown Breadcrumb component (#2092)

* Update material to beta8

* Install @angular/cdk

* DropdownBreadcrumb component

* Style fixes

* Fix styling issues after rebase

* Fix Material issue in processlist

* Update material again, because of rebase errors... :/

* Fix new tslint rule raised errors

ng2-components/ng2-alfresco-documentlist/src/components/breadcrumb/dropdown-breadcrumb.component.ts

@@ -0,0 +1,66 @@
+/*!
+ * @license
+ * Copyright 2016 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 { Component, OnChanges, SimpleChanges, ViewChild, ViewEncapsulation } from '@angular/core';
+import { MdSelect } from '@angular/material';
+import { PathElementEntity } from 'alfresco-js-api';
+import { BreadcrumbComponent } from './breadcrumb.component';
+
+@Component({
+    selector: 'adf-dropdown-breadcrumb',
+    templateUrl: './dropdown-breadcrumb.component.html',
+    styleUrls: ['./dropdown-breadcrumb.component.scss'],
+    encapsulation: ViewEncapsulation.None,
+    host: {
+        'class': 'adf-dropdown-breadcrumb'
+    }
+})
+export class DropdownBreadcrumbComponent extends BreadcrumbComponent implements OnChanges {
+    @ViewChild(MdSelect) selectbox: MdSelect;
+
+    currentNode: PathElementEntity;
+    previousNodes: PathElementEntity[];
+
+    ngOnChanges(changes: SimpleChanges): void {
+        super.ngOnChanges(changes);
+        this.recalculateNodes();
+    }
+
+    /**
+     * Calculate the current and previous nodes from the route array
+     */
+    private recalculateNodes(): void {
+        this.currentNode = this.route[this.route.length - 1];
+        this.previousNodes = this.route.slice(0, this.route.length - 1).reverse();
+    }
+
+    /**
+     * Opens the selectbox overlay
+     */
+    open(): void {
+        if (this.selectbox) {
+            this.selectbox.open();
+        }
+    }
+
+    /**
+     * Return if route has more than one element (means: we are not in the root directory)
+     */
+    hasPreviousNodes(): boolean {
+        return this.previousNodes.length > 0;
+    }
+}