Checkbox allow customizing of input and label classNames. (#11372)

* add client side integration for custom styles for checkbox.label and checkbox.input

* add server side integration for checkbox element styling

* add server side tests

* add client side test

2 files changed, 10 insertions, 1 deletions

diff --git a/shared/src/main/java/com/vaadin/shared/ui/ComponentStateUtil.java b/shared/src/main/java/com/vaadin/shared/ui/ComponentStateUtil.java
index 494af9151d..3daa91d436 100644
--- a/shared/src/main/java/com/vaadin/shared/ui/ComponentStateUtil.java
+++ b/shared/src/main/java/com/vaadin/shared/ui/ComponentStateUtil.java
@@ -17,6 +17,7 @@ package com.vaadin.shared.ui;
 
 import java.io.Serializable;
 import java.util.HashSet;
+import java.util.List;
 
 import com.vaadin.shared.AbstractComponentState;
 import com.vaadin.shared.Registration;
@@ -42,7 +43,11 @@ public final class ComponentStateUtil implements Serializable {
     }
 
     public static final boolean hasStyles(AbstractComponentState state) {
-        return state.styles != null && !state.styles.isEmpty();
+        return hasStyles(state.styles);
+    }
+
+    public static final boolean hasStyles(List<String> styles) {
+        return styles != null && !styles.isEmpty();
     }
 
     public static final boolean isRelativeWidth(AbstractComponentState state) {
diff --git a/shared/src/main/java/com/vaadin/shared/ui/checkbox/CheckBoxState.java b/shared/src/main/java/com/vaadin/shared/ui/checkbox/CheckBoxState.java
index c3e4c29c83..2a35a23726 100644
--- a/shared/src/main/java/com/vaadin/shared/ui/checkbox/CheckBoxState.java
+++ b/shared/src/main/java/com/vaadin/shared/ui/checkbox/CheckBoxState.java
@@ -17,10 +17,14 @@ package com.vaadin.shared.ui.checkbox;
 
 import com.vaadin.shared.AbstractFieldState;
 
+import java.util.List;
+
 public class CheckBoxState extends AbstractFieldState {
     {
         primaryStyleName = "v-checkbox";
     }
 
     public boolean checked = false;
+    public List<String> inputStyles = null;
+    public List<String> labelStyles = null;
 }