Move onClick logic to the Connector (#11367)

* Move onClick logic to the Connector

Move onClick event handling from 'VNativeButton' to NativeButtonConnector. Now works as for regular button.

Also, adding propagation of the `enabled` value to the state on disableOnClick being true

Fixes https://github.com/vaadin/framework/issues/11188

all/src/main/templates/release-notes.html

 
         <ul>
             <li><tt>VaadinIcons.SEARCH_MINUS</tt> and <tt>VaadinIcons.SEARCH_PLUS</tt> codes were changed due to typo fix</li>
+	      <li>Public <tt>disableOnClick</tt> variable in <tt>VNatiButton</tt> is removed due to the refactoring</li>
         </ul>
 
         <h2>For incompatible or behavior-altering changes in 8.6, please see <a href="https://vaadin.com/download/release/8.6/8.6.0/release-notes.html#incompatible">8.6 release notes</a></h2>

client/src/main/java/com/vaadin/client/ui/VNativeButton.java

 import com.google.gwt.user.client.ui.Button;
 import com.vaadin.client.ApplicationConnection;
 import com.vaadin.client.BrowserInfo;
-import com.vaadin.client.MouseEventDetailsBuilder;
-import com.vaadin.client.StyleConstants;
 import com.vaadin.client.Util;
 import com.vaadin.client.WidgetUtil.ErrorUtil;
-import com.vaadin.shared.MouseEventDetails;
 import com.vaadin.shared.ui.button.ButtonServerRpc;
 
 public class VNativeButton extends Button
      * mouse while clicking it. In this case mouse leaves the button without
      * moving.
      */
-    private boolean clickPending;
+    public boolean clickPending;
 
     private boolean cancelNextClick = false;
 
-    /** For internal use only. May be removed or replaced in the future. */
-    public boolean disableOnClick = false;
-
     public VNativeButton() {
         setStyleName(CLASSNAME);
 
             // (#11854)
             setFocus(true);
         }
-        if (disableOnClick) {
-            setEnabled(false);
-            // FIXME: This should be moved to NativeButtonConnector along with
-            // buttonRpcProxy
-            addStyleName(StyleConstants.DISABLED);
-            buttonRpcProxy.disableOnClick();
-        }
-
-        // Add mouse details
-        MouseEventDetails details = MouseEventDetailsBuilder
-                .buildMouseEventDetails(event.getNativeEvent(), getElement());
-        buttonRpcProxy.click(details);
-
-        clickPending = false;
     }
 
     @Override

client/src/main/java/com/vaadin/client/ui/nativebutton/NativeButtonConnector.java

  */
 package com.vaadin.client.ui.nativebutton;
 
+import com.google.gwt.event.dom.client.ClickEvent;
+import com.google.gwt.event.dom.client.ClickHandler;
+import com.vaadin.client.MouseEventDetailsBuilder;
 import com.vaadin.client.VCaption;
 import com.vaadin.client.communication.StateChangeEvent;
 import com.vaadin.client.ui.AbstractComponentConnector;
 import com.vaadin.client.ui.ConnectorFocusAndBlurHandler;
 import com.vaadin.client.ui.Icon;
 import com.vaadin.client.ui.VNativeButton;
+import com.vaadin.shared.MouseEventDetails;
 import com.vaadin.shared.ui.Connect;
 import com.vaadin.shared.ui.button.ButtonServerRpc;
 import com.vaadin.shared.ui.button.NativeButtonState;
 import com.vaadin.ui.NativeButton;
 
 @Connect(NativeButton.class)
-public class NativeButtonConnector extends AbstractComponentConnector {
+public class NativeButtonConnector extends AbstractComponentConnector
+        implements ClickHandler {
 
     @Override
     public void init() {
         getWidget().client = getConnection();
         getWidget().paintableId = getConnectorId();
 
+        getWidget().addClickHandler(this);
         ConnectorFocusAndBlurHandler.addHandlers(this);
     }
 
     public void onStateChanged(StateChangeEvent stateChangeEvent) {
         super.onStateChanged(stateChangeEvent);
 
-        getWidget().disableOnClick = getState().disableOnClick;
-
         // Set text
         VCaption.setCaptionText(getWidget(), getState());
 
     public NativeButtonState getState() {
         return (NativeButtonState) super.getState();
     }
+
+    @Override
+    public void onClick(ClickEvent event) {
+        if (getState().disableOnClick) {
+            getState().enabled = false;
+            super.updateEnabledState(false);
+            getRpcProxy(ButtonServerRpc.class).disableOnClick();
+        }
+
+        // Add mouse details
+        MouseEventDetails details = MouseEventDetailsBuilder
+                .buildMouseEventDetails(event.getNativeEvent(),
+                        getWidget().getElement());
+        getRpcProxy(ButtonServerRpc.class).click(details);
+
+        getWidget().clickPending = false;
+    }
 }

uitest/src/main/java/com/vaadin/tests/components/nativebutton/NativeButtonDisableOnClick.java

+package com.vaadin.tests.components.nativebutton;
+
+import com.vaadin.annotations.Widgetset;
+import com.vaadin.server.VaadinRequest;
+import com.vaadin.tests.components.AbstractTestUI;
+import com.vaadin.ui.NativeButton;
+import com.vaadin.ui.Button;
+
+@Widgetset("com.vaadin.DefaultWidgetSet")
+public class NativeButtonDisableOnClick extends AbstractTestUI {
+    public static String UPDATED_CAPTION = "Updated caption";
+
+    @Override
+    protected void setup(VaadinRequest request) {
+        Button button = new NativeButton("Click Me");
+        button.setId("buttonId");
+        button.setDisableOnClick(true);
+        button.addClickListener(e -> {
+            if (UPDATED_CAPTION.equals(button.getCaption())) {
+                button.setCaption("Failed");
+            } else {
+                button.setCaption(UPDATED_CAPTION);
+            }
+        });
+        addComponent(button);
+    }
+}

uitest/src/test/java/com/vaadin/tests/components/nativebutton/NativeButtonDisableOnClickTest.java

+package com.vaadin.tests.components.nativebutton;
+
+import com.vaadin.tests.tb3.MultiBrowserTest;
+import org.junit.Test;
+import org.openqa.selenium.By;
+import org.openqa.selenium.WebElement;
+
+import static org.junit.Assert.assertEquals;
+
+public class NativeButtonDisableOnClickTest extends MultiBrowserTest {
+
+    @Test
+    public void testButtonIsDisabled() {
+        openTestURL();
+        WebElement button = findElement(By.id("buttonId"));
+        assertEquals(true, button.isEnabled());
+
+        button.click();
+        assertEquals(NativeButtonDisableOnClick.UPDATED_CAPTION,
+                button.getText());
+        assertEquals(false, button.isEnabled());
+
+        button.click();
+        assertEquals(NativeButtonDisableOnClick.UPDATED_CAPTION,
+                button.getText());
+    }
+}