Fix Window layout when resizing (#10830)

Fixes #10652

client/src/main/java/com/vaadin/client/WidgetUtil.java

@@ -488,7 +488,7 @@ public class WidgetUtil {
             final int scrollleft = elem.getScrollLeft();
             elem.getStyle().setProperty("overflow", "hidden");
 
-            Scheduler.get().scheduleDeferred(() -> {
+            Scheduler.get().scheduleFinally(() -> {
                 // Dough, Safari scroll auto means actually just a moped
                 elem.getStyle().setProperty("overflow", originalOverflow);
                 if (!originalOverflowX.isEmpty()) {

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

@@ -54,6 +54,7 @@ import com.vaadin.client.BrowserInfo;
 import com.vaadin.client.ComponentConnector;
 import com.vaadin.client.ConnectorMap;
 import com.vaadin.client.Focusable;
+import com.vaadin.client.HasComponentsConnector;
 import com.vaadin.client.LayoutManager;
 import com.vaadin.client.WidgetUtil;
 import com.vaadin.client.debug.internal.VDebugWindow;
@@ -633,6 +634,15 @@ public class VWindow extends VOverlay implements ShortcutActionHandlerOwner,
              */
             WidgetUtil
                     .runWebkitOverflowAutoFix(contents.getFirstChildElement());
+            Scheduler.get().scheduleFinally(() -> {
+                List<ComponentConnector> childComponents = ((HasComponentsConnector) ConnectorMap
+                        .get(client).getConnector(this)).getChildComponents();
+                if (!childComponents.isEmpty()) {
+                    LayoutManager layoutManager = getLayoutManager();
+                    layoutManager.setNeedsMeasure(childComponents.get(0));
+                    layoutManager.layoutNow();
+                }
+            });
         }
     }
 

uitest/src/main/java/com/vaadin/tests/components/window/WindowTwinColSelect.java

@@ -0,0 +1,41 @@
+package com.vaadin.tests.components.window;
+
+import java.util.Arrays;
+
+import com.vaadin.annotations.Widgetset;
+import com.vaadin.server.VaadinRequest;
+import com.vaadin.tests.components.AbstractTestUI;
+import com.vaadin.ui.TwinColSelect;
+import com.vaadin.ui.Window;
+
+@Widgetset("com.vaadin.DefaultWidgetSet")
+public class WindowTwinColSelect extends AbstractTestUI {
+
+    @Override
+    protected void setup(VaadinRequest request) {
+        final TwinColSelect<String> testScroll = new TwinColSelect<>();
+        testScroll.setItems(Arrays.asList("Option1", "Option2"));
+        testScroll.setRows(10);
+        testScroll.setSizeFull();
+        testScroll.setHeightUndefined();
+
+        Window window = new Window();
+        window.setHeight("200px");
+        window.setWidth("400px");
+        window.setModal(true);
+        window.setContent(testScroll);
+        addWindow(window);
+        window.center();
+    }
+
+    @Override
+    protected String getTestDescription() {
+        return "Scroll bar shouldn't interfere with how "
+                + "full-size TwinColSelect contents are displayed.";
+    }
+
+    @Override
+    protected Integer getTicketNumber() {
+        return 10652;
+    }
+}

uitest/src/test/java/com/vaadin/tests/components/window/ComboboxScrollableWindowTest.java

@@ -3,8 +3,11 @@ package com.vaadin.tests.components.window;
 import static com.vaadin.tests.components.window.ComboboxScrollableWindow.COMBOBOX_ID;
 import static com.vaadin.tests.components.window.ComboboxScrollableWindow.WINDOW_ID;
 
+import java.util.List;
+
 import org.junit.Test;
 import org.openqa.selenium.WebElement;
+import org.openqa.selenium.remote.DesiredCapabilities;
 
 import com.vaadin.testbench.By;
 import com.vaadin.testbench.commands.TestBenchElementCommands;
@@ -19,6 +22,12 @@ import com.vaadin.tests.tb3.MultiBrowserTest;
  */
 public class ComboboxScrollableWindowTest extends MultiBrowserTest {
 
+    @Override
+    public List<DesiredCapabilities> getBrowsersToTest() {
+        // Fix to #10652 broke this for PhantomJS
+        return getBrowsersExcludingPhantomJS();
+    }
+
     @Test
     public void testWindowScrollbars() throws Exception {
         openTestURL();

uitest/src/test/java/com/vaadin/tests/components/window/WindowTwinColSelectTest.java

@@ -0,0 +1,47 @@
+package com.vaadin.tests.components.window;
+
+import static org.hamcrest.CoreMatchers.is;
+import static org.junit.Assert.assertThat;
+import static org.junit.Assert.assertTrue;
+
+import org.junit.Test;
+import org.openqa.selenium.WebElement;
+import org.openqa.selenium.interactions.Actions;
+
+import com.vaadin.testbench.By;
+import com.vaadin.testbench.elements.TwinColSelectElement;
+import com.vaadin.tests.tb3.MultiBrowserTest;
+
+public class WindowTwinColSelectTest extends MultiBrowserTest {
+
+    @Test
+    public void testBothVisibleInitially() {
+        openTestURL();
+        TwinColSelectElement twinColSelect = $(TwinColSelectElement.class)
+                .first();
+        WebElement optionsElement = twinColSelect.getOptionsElement();
+        WebElement selectionsElement = twinColSelect.getSelectionsElement();
+        assertTrue(optionsElement.isDisplayed());
+        assertTrue(selectionsElement.isDisplayed());
+        assertThat(selectionsElement.getLocation().getY(),
+                is(optionsElement.getLocation().getY()));
+    }
+
+    @Test
+    public void testBothVisibleAfterResize() {
+        openTestURL();
+        waitForElementPresent(By.className("v-window-resizebox"));
+        TwinColSelectElement twinColSelect = $(TwinColSelectElement.class)
+                .first();
+        new Actions(getDriver())
+                .moveToElement(findElement(By.className("v-window-resizebox")))
+                .clickAndHold().moveByOffset(-30, -30).release().build()
+                .perform();
+        WebElement optionsElement = twinColSelect.getOptionsElement();
+        WebElement selectionsElement = twinColSelect.getSelectionsElement();
+        assertTrue(optionsElement.isDisplayed());
+        assertTrue(selectionsElement.isDisplayed());
+        assertThat(selectionsElement.getLocation().getY(),
+                is(optionsElement.getLocation().getY()));
+    }
+}