refactor: move angular source to /packages rather than modules/@angular

packages/router/src/url_handling_strategy.ts

@@ -0,0 +1,46 @@
+/**
+ * @license
+ * Copyright Google Inc. All Rights Reserved.
+ *
+ * Use of this source code is governed by an MIT-style license that can be
+ * found in the LICENSE file at https://angular.io/license
+ */
+
+import {UrlTree} from './url_tree';
+
+/**
+ * @whatItDoes Provides a way to migrate AngularJS applications to Angular.
+ *
+ * @experimental
+ */
+export abstract class UrlHandlingStrategy {
+  /**
+   * Tells the router if this URL should be processed.
+   *
+   * When it returns true, the router will execute the regular navigation.
+   * When it returns false, the router will set the router state to an empty state.
+   * As a result, all the active components will be destroyed.
+   *
+   */
+  abstract shouldProcessUrl(url: UrlTree): boolean;
+
+  /**
+   * Extracts the part of the URL that should be handled by the router.
+   * The rest of the URL will remain untouched.
+   */
+  abstract extract(url: UrlTree): UrlTree;
+
+  /**
+   * Merges the URL fragment with the rest of the URL.
+   */
+  abstract merge(newUrlPart: UrlTree, rawUrl: UrlTree): UrlTree;
+}
+
+/**
+ * @experimental
+ */
+export class DefaultUrlHandlingStrategy implements UrlHandlingStrategy {
+  shouldProcessUrl(url: UrlTree): boolean { return true; }
+  extract(url: UrlTree): UrlTree { return url; }
+  merge(newUrlPart: UrlTree, wholeUrl: UrlTree): UrlTree { return newUrlPart; }
+}