Make clicking checkbox label call focus listeners (#9271)

Fixes the remaining issue from #3944 for Firefox so that a click on the checkbox label calls the focus listener.

Fixes #9290

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

@@ -55,9 +55,9 @@ public class VCheckBox extends com.google.gwt.user.client.ui.CheckBox
             el = DOM.getNextSibling(el);
         }
 
-        if (BrowserInfo.get().isWebkit()) {
-            // Webkit does not focus non-text input elements on click
-            // (#11854)
+        if (BrowserInfo.get().isWebkit() || BrowserInfo.get().isFirefox()) {
+            // Webkit and Firefox do not focus non-text input elements on click
+            // (#3944)
             addClickHandler(new ClickHandler() {
                 @Override
                 public void onClick(ClickEvent event) {

compatibility-client/src/main/java/com/vaadin/v7/client/ui/VCheckBox.java

@@ -60,9 +60,9 @@ public class VCheckBox extends com.google.gwt.user.client.ui.CheckBox
             el = DOM.getNextSibling(el);
         }
 
-        if (BrowserInfo.get().isWebkit()) {
-            // Webkit does not focus non-text input elements on click
-            // (#11854)
+        if (BrowserInfo.get().isWebkit() || BrowserInfo.get().isFirefox()) {
+            // Webkit and Firefox do not focus non-text input elements on click
+            // (#3944)
             addClickHandler(new ClickHandler() {
                 @Override
                 public void onClick(ClickEvent event) {

uitest/src/main/java/com/vaadin/tests/components/checkbox/CheckboxFocusClick.java

@@ -0,0 +1,32 @@
+/*
+ * Copyright 2000-2017 Vaadin 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.
+ */
+package com.vaadin.tests.components.checkbox;
+
+import com.vaadin.event.FieldEvents;
+import com.vaadin.server.VaadinRequest;
+import com.vaadin.tests.components.AbstractTestUIWithLog;
+import com.vaadin.ui.CheckBox;
+
+public class CheckboxFocusClick extends AbstractTestUIWithLog {
+
+    @Override
+    protected void setup(VaadinRequest request) {
+        final CheckBox cb = new CheckBox("Click me", true);
+        cb.addFocusListener((FieldEvents.FocusListener) event -> log("checkbox focused"));
+        addComponent(cb);
+    }
+
+}

uitest/src/test/java/com/vaadin/tests/components/checkbox/CheckboxFocusClickTest.java

@@ -0,0 +1,37 @@
+/*
+ * Copyright 2000-2017 Vaadin 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.
+ */
+package com.vaadin.tests.components.checkbox;
+
+import com.vaadin.testbench.By;
+import com.vaadin.testbench.elements.CheckBoxElement;
+import com.vaadin.tests.tb3.MultiBrowserTest;
+import org.junit.Assert;
+import org.junit.Test;
+import org.openqa.selenium.WebElement;
+
+public class CheckboxFocusClickTest extends MultiBrowserTest {
+
+    @Test
+    public void contextClickCheckboxAndText() {
+        openTestURL();
+        CheckBoxElement checkbox = $(CheckBoxElement.class).first();
+        Assert.assertEquals("checked", checkbox.getValue());
+        WebElement label = checkbox.findElement(By.xpath("label"));
+
+        clickElement(label);
+        Assert.assertEquals("1. checkbox focused", getLogRow(0));
+    }
+}