feat: add support for legacy demos

Author: javier-godoy

src/main/java/com/flowingcode/vaadin/addons/demo/RouteTabs.java

@@ -1,18 +1,21 @@
 package com.flowingcode.vaadin.addons.demo;
 
-import java.util.LinkedHashMap;
-import java.util.Map;
-import java.util.Optional;
+import com.vaadin.flow.component.Component;
+import com.vaadin.flow.component.UI;
 import com.vaadin.flow.component.tabs.Tab;
 import com.vaadin.flow.component.tabs.Tabs;
 import com.vaadin.flow.router.BeforeEnterEvent;
 import com.vaadin.flow.router.BeforeEnterObserver;
 import com.vaadin.flow.router.HighlightConditions;
+import com.vaadin.flow.router.Location;
 import com.vaadin.flow.router.RouterLink;
+import java.util.LinkedHashMap;
+import java.util.Map;
+import java.util.Optional;
 
 /**
  * Extension of Tabs in order to allow to bind tabs with Routes.
- * 
+ *
  * @see https://cookbook.vaadin.com/tabs-with-routes/a
  */
 public class RouteTabs extends Tabs implements BeforeEnterObserver {
@@ -22,13 +25,17 @@ public class RouteTabs extends Tabs implements BeforeEnterObserver {
   public void add(RouterLink routerLink) {
     routerLink.setHighlightCondition(HighlightConditions.sameLocation());
     routerLink.setHighlightAction((link, shouldHighlight) -> {
-      if (shouldHighlight)
+      if (shouldHighlight) {
         setSelectedTab(routerLinkTabMap.get(routerLink));
+      }
     });
     routerLinkTabMap.put(routerLink, new Tab(routerLink));
     add(routerLinkTabMap.get(routerLink));
   }
 
+  public void addLegacyTab(RouterLink routerLink) {
+
+  }
   @Override
   public void beforeEnter(BeforeEnterEvent event) {
     // In case no tabs will match
@@ -44,4 +51,18 @@ public RouterLink getFirstRoute() {
         routerLinkTabMap.entrySet().stream().map(Map.Entry::getKey).findFirst();
     return first.isPresent() ? first.get() : null;
   }
+
+  @Deprecated
+  public void addLegacyTab(String label, Component content) {
+    Tab tab = new Tab(label);
+    add(tab);
+    addSelectedChangeListener(ev -> {
+      if (ev.getSelectedTab() == tab) {
+        UI.getCurrent().getPage().getHistory().pushState(null, new Location(""));
+        ((TabbedDemo) getParent().get()).removeRouterLayoutContent(null);
+        ((TabbedDemo) getParent().get()).showRouterLayoutContent(content);
+      }
+    });
+  }
+
 }

src/main/java/com/flowingcode/vaadin/addons/demo/TabbedDemo.java

@@ -83,36 +83,26 @@ public TabbedDemo() {
    *
    * @param demo the demo instance
    */
+  @Deprecated
   public void addDemo(Component demo) {
     DemoSource demoSource = demo.getClass().getAnnotation(DemoSource.class);
 
-    String sourceCodeUrl = null;
-    if (demoSource != null) {
-      sourceCodeUrl = demoSource.value();
-      if (sourceCodeUrl.equals(DemoSource.GITHUB_SOURCE)) {
-        sourceCodeUrl = Optional.ofNullable(this.getClass().getAnnotation(GithubLink.class))
-            .map(githubLink -> githubLink.value() + "/blob/master/src/test/java/"
-                + demo.getClass().getName().replace('.', '/') + ".java")
-            .orElse(null);
-      }
-    }
-
     String label =
         Optional.ofNullable(demo.getClass().getAnnotation(PageTitle.class))
             .map(PageTitle::value)
             .orElse(demo.getClass().getSimpleName());
 
-    addDemo(demo, label, sourceCodeUrl);
+    addDemo(demo, label, null);
   }
 
   /**
    * @param demo the demo instance
    * @param label the demo name (tab label)
-   * @param sourceCodeUrl the url of the demo, <b>null</b> to not show source code section.
+   * @param sourceCodeUrl ignored.
    */
   @Deprecated
   public void addDemo(Component demo, String label, String sourceCodeUrl) {
-    this.addDemo(demo.getClass(), label);
+    tabs.addLegacyTab(label, demo);
   }
 
   /** Add a tab with a demo component.
@@ -143,6 +133,7 @@ public void addDemo(Class<? extends Component> clazz) {
     addDemo(clazz, label);
   }
 
+  @Deprecated
   public void addDemo(Component demo, String label) {
     addDemo(demo, label, null);
   }

src/test/java/com/flowingcode/vaadin/addons/demo/Demo.java

@@ -30,6 +30,7 @@
 public class Demo extends TabbedDemo {
 
   public Demo() {
+    addDemo(new LegacyDemo());
     addDemo(SampleDemo.class, "Demo");
     addDemo(SampleDemoDefault.class);
   }

src/test/java/com/flowingcode/vaadin/addons/demo/LegacyDemo.java

@@ -0,0 +1,34 @@
+/*-
+ * #%L
+ * Commons Demo
+ * %%
+ * Copyright (C) 2020 - 2021 Flowing Code
+ * %%
+ * 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.
+ * #L%
+ */
+package com.flowingcode.vaadin.addons.demo;
+
+import com.vaadin.flow.component.html.Div;
+import com.vaadin.flow.component.html.Span;
+import com.vaadin.flow.router.PageTitle;
+
+@PageTitle("Legacy")
+@DemoSource
+public class LegacyDemo extends Div {
+
+  public LegacyDemo() {
+    add(new Span("Legacy demo"));
+  }
+
+}