Fix RichTextArea read-only+disabled

Resolves #10541

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

@@ -163,8 +163,8 @@ public class VRichTextArea extends Composite implements Field, KeyPressHandler,
     public void setEnabled(boolean enabled) {
         if (this.enabled != enabled) {
             // rta.setEnabled(enabled);
-            swapEditableArea();
             this.enabled = enabled;
+            swapEditableArea();
         }
     }
 
@@ -179,6 +179,9 @@ public class VRichTextArea extends Composite implements Field, KeyPressHandler,
     private void swapEditableArea() {
         String value = getValue();
         if (html.isAttached()) {
+            if (isReadOnly() || !isEnabled()) {
+                return;
+            }
             fp.remove(html);
             if (BrowserInfo.get().isWebkit()) {
                 fp.remove(formatter);
@@ -218,8 +221,8 @@ public class VRichTextArea extends Composite implements Field, KeyPressHandler,
 
     public void setReadOnly(boolean b) {
         if (isReadOnly() != b) {
-            swapEditableArea();
             readOnly = b;
+            swapEditableArea();
         }
         // reset visibility in case enabled state changed and the formatter was
         // recreated

uitest/src/main/java/com/vaadin/tests/components/richtextarea/RichTextAreaReadOnlyDisabled.java

@@ -0,0 +1,31 @@
+package com.vaadin.tests.components.richtextarea;
+
+import com.vaadin.server.VaadinRequest;
+import com.vaadin.tests.components.AbstractTestUI;
+import com.vaadin.ui.Button;
+import com.vaadin.ui.RichTextArea;
+
+public class RichTextAreaReadOnlyDisabled extends AbstractTestUI {
+
+    @Override
+    protected void setup(VaadinRequest request) {
+        RichTextArea readOnlyDisabledTextArea = new RichTextArea(
+                "Readonly & Disabled");
+        readOnlyDisabledTextArea.setReadOnly(true);
+        readOnlyDisabledTextArea.setEnabled(false);
+        readOnlyDisabledTextArea.setValue("Random value");
+        readOnlyDisabledTextArea.setId("rtA");
+
+        final Button but1 = new Button("set Read ",
+                event -> readOnlyDisabledTextArea
+                        .setReadOnly(!readOnlyDisabledTextArea.isReadOnly()));
+        but1.setId("readPr");
+        final Button but2 = new Button("Enable/Disable ",
+                event -> readOnlyDisabledTextArea
+                        .setEnabled(!readOnlyDisabledTextArea.isEnabled()));
+        but2.setId("enablePr");
+        addComponent(readOnlyDisabledTextArea);
+        addComponent(but1);
+        addComponent(but2);
+    }
+}

uitest/src/test/java/com/vaadin/tests/components/richtextarea/RichTextAreaReadOnlyDisabledTest.java

@@ -0,0 +1,37 @@
+package com.vaadin.tests.components.richtextarea;
+
+import com.vaadin.tests.tb3.MultiBrowserTest;
+import org.junit.Test;
+import org.openqa.selenium.By;
+import org.openqa.selenium.WebElement;
+import org.openqa.selenium.remote.DesiredCapabilities;
+
+import java.util.List;
+
+public class RichTextAreaReadOnlyDisabledTest extends MultiBrowserTest {
+
+    @Override
+    public List<DesiredCapabilities> getBrowsersToTest() {
+        return getBrowsersExcludingPhantomJS();
+    }
+
+    @Test
+    public void shouldDelegateToShortcutActionHandler() {
+        openTestURL();
+        // gwt-RichTextArea is classname used by iframe
+        WebElement readPrB = findElement(By.id("readPr"));
+        WebElement enablePrB = findElement(By.id("enablePr"));
+
+        assertElementNotPresent(By.className("gwt-RichTextArea"));
+        readPrB.click();
+
+        assertElementNotPresent(By.className("gwt-RichTextArea"));
+        enablePrB.click();
+
+        assertElementPresent(By.className("gwt-RichTextArea"));
+        readPrB.click();//Set to read-only
+        assertElementNotPresent(By.className("gwt-RichTextArea"));
+        enablePrB.click();//Set disabled
+        assertElementNotPresent(By.className("gwt-RichTextArea"));
+    }
+}