Aw5739 Add ngx openlayers

projects/ngx-openlayers/src/lib/sources/source.component.ts

@@ -0,0 +1,27 @@
+import { Directive, Input, OnDestroy } from '@angular/core';
+import { Source } from 'ol';
+
+import { LayerComponent } from '../layers/layer.component';
+
+@Directive()
+export abstract class SourceComponent implements OnDestroy {
+  @Input()
+  attributions: any;
+
+  public instance: Source;
+  public componentType = 'source';
+
+  constructor(protected host: LayerComponent) {}
+
+  ngOnDestroy() {
+    if (this.host && this.host.instance) {
+      this.host.instance.setSource(null);
+    }
+  }
+
+  protected _register(s: Source) {
+    if (this.host) {
+      this.host.instance.setSource(s);
+    }
+  }
+}