Remove o.e.jface.text.tests copy of DisplayHelper

Use o.e.ui.tests.harness.util.DisplayHelper instead.
Standardizing on one implementation to get less surprises.

Author: akurtakov

tests/org.eclipse.jface.text.tests/META-INF/MANIFEST.MF

@@ -13,15 +13,15 @@ Export-Package:
  org.eclipse.jface.text.tests.rules,
  org.eclipse.jface.text.tests.source,
  org.eclipse.jface.text.tests.source.inlined,
- org.eclipse.jface.text.tests.templates.persistence,
- org.eclipse.jface.text.tests.util
+ org.eclipse.jface.text.tests.templates.persistence
 Require-Bundle: 
  org.eclipse.jface.text;bundle-version="[3.20.0,4.0.0)",
  org.eclipse.jface;bundle-version="[3.5.0,4.0.0)",
  org.junit;bundle-version="4.12.0",
  org.eclipse.text.tests;bundle-version="[3.5.0,4.0.0)",
  org.eclipse.core.runtime;bundle-version="[3.29.0,4.0.0)",
  org.eclipse.ui.workbench.texteditor,
+ org.eclipse.ui.tests.harness,
  org.eclipse.test;bundle-version="3.6.200"
 Bundle-RequiredExecutionEnvironment: JavaSE-17
 Eclipse-BundleShape: dir

tests/org.eclipse.jface.text.tests/src/org/eclipse/jface/text/tests/MultiSelectionTest.java

@@ -43,7 +43,8 @@
 import org.eclipse.jface.text.MultiTextSelection;
 import org.eclipse.jface.text.Region;
 import org.eclipse.jface.text.TextViewer;
-import org.eclipse.jface.text.tests.util.DisplayHelper;
+
+import org.eclipse.ui.tests.harness.util.DisplayHelper;
 
 public class MultiSelectionTest {
 

tests/org.eclipse.jface.text.tests/src/org/eclipse/jface/text/tests/TextViewerTest.java

@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2014, 2024 Google, Inc and others.
+ * Copyright (c) 2014, 2025 Google, Inc and others.
  *
  * This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License 2.0
@@ -71,7 +71,8 @@
 import org.eclipse.jface.text.hyperlink.URLHyperlinkDetector;
 import org.eclipse.jface.text.source.SourceViewer;
 import org.eclipse.jface.text.source.SourceViewerConfiguration;
-import org.eclipse.jface.text.tests.util.DisplayHelper;
+
+import org.eclipse.ui.tests.harness.util.DisplayHelper;
 
 /**
  * Basic tests for TextViewer.
@@ -289,7 +290,7 @@ public static void ctrlHome(ITextViewer viewer) {
 	static void postKeyEvent(Control widget, int keyCode, int stateMask, int type) {
 		Display display= widget.getDisplay();
 		widget.setFocus();
-		DisplayHelper.driveEventQueue(display);
+		DisplayHelper.runEventLoop(display, 0);
 		Event event = new Event();
 		event.widget = widget;
 		event.keyCode = keyCode;
@@ -301,7 +302,7 @@ static void postKeyEvent(Control widget, int keyCode, int stateMask, int type) {
 		for (Listener listener : listeners) {
 			listener.handleEvent(event);
 		}
-		DisplayHelper.driveEventQueue(display);
+		DisplayHelper.runEventLoop(display, 0);
 	}
 
 	public static String generate5000Lines() {

tests/org.eclipse.jface.text.tests/src/org/eclipse/jface/text/tests/codemining/CodeMiningLineHeaderAnnotationTest.java

@@ -35,7 +35,8 @@
 import org.eclipse.jface.text.source.SourceViewer;
 import org.eclipse.jface.text.source.inlined.AbstractInlinedAnnotation;
 import org.eclipse.jface.text.source.inlined.InlinedAnnotationSupport;
-import org.eclipse.jface.text.tests.util.DisplayHelper;
+
+import org.eclipse.ui.tests.harness.util.DisplayHelper;
 
 public class CodeMiningLineHeaderAnnotationTest {
 

tests/org.eclipse.jface.text.tests/src/org/eclipse/jface/text/tests/codemining/CodeMiningProjectionViewerTest.java

@@ -60,7 +60,8 @@
 import org.eclipse.jface.text.source.projection.ProjectionViewer;
 import org.eclipse.jface.text.tests.contentassist.BarContentAssistProcessor;
 import org.eclipse.jface.text.tests.source.inlined.LineContentBoundsDrawingTest.AccessAllAnnoations;
-import org.eclipse.jface.text.tests.util.DisplayHelper;
+
+import org.eclipse.ui.tests.harness.util.DisplayHelper;
 
 public class CodeMiningProjectionViewerTest {
 
@@ -193,7 +194,7 @@ public IContentAssistant getContentAssistant(ISourceViewer sourceViewer) {
 		fParent.setSize(200, 4 * fViewer.getTextWidget().getLineHeight());
 		//fParent.pack(true);
 		fParent.open();
-		DisplayHelper.driveEventQueue(fParent.getDisplay());
+		DisplayHelper.runEventLoop(fParent.getDisplay(), 0);
 		// ensure ViewportGuard is initialized
 		fViewer.getControl().notifyListeners(SWT.KeyUp, new Event());
 		fViewer.setSelectedRange(1, 0);

tests/org.eclipse.jface.text.tests/src/org/eclipse/jface/text/tests/codemining/CodeMiningTest.java

@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2019 Red Hat Inc. and others.
+ * Copyright (c) 2019, 2025 Red Hat Inc. and others.
  *
  * This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License 2.0
@@ -63,7 +63,8 @@
 import org.eclipse.jface.text.source.AnnotationPainter;
 import org.eclipse.jface.text.source.SourceViewer;
 import org.eclipse.jface.text.tests.TextViewerTest;
-import org.eclipse.jface.text.tests.util.DisplayHelper;
+
+import org.eclipse.ui.tests.harness.util.DisplayHelper;
 
 public class CodeMiningTest {
 

tests/org.eclipse.jface.text.tests/src/org/eclipse/jface/text/tests/contentassist/AbstractContentAssistTest.java

@@ -42,7 +42,8 @@
 import org.eclipse.jface.text.source.ISourceViewer;
 import org.eclipse.jface.text.source.SourceViewer;
 import org.eclipse.jface.text.source.SourceViewerConfiguration;
-import org.eclipse.jface.text.tests.util.DisplayHelper;
+
+import org.eclipse.ui.tests.harness.util.DisplayHelper;
 
 
 public class AbstractContentAssistTest {
@@ -65,7 +66,7 @@ public void setUp() {
 		for (Shell s : shells) {
 			s.dispose();
 		}
-		DisplayHelper.driveEventQueue(Display.getDefault());
+		DisplayHelper.runEventLoop(Display.getDefault(), 0);
 	}
 
 	@After
@@ -207,7 +208,7 @@ public Button getButton() {
 
 
 	protected static void processEvents() {
-		DisplayHelper.driveEventQueue(getDisplay());
+		DisplayHelper.runEventLoop(getDisplay(), 0);
 	}
 
 	private static Display getDisplay() {

tests/org.eclipse.jface.text.tests/src/org/eclipse/jface/text/tests/contentassist/AsyncContentAssistTest.java

@@ -47,7 +47,8 @@
 import org.eclipse.jface.text.IDocument;
 import org.eclipse.jface.text.contentassist.ContentAssistant;
 import org.eclipse.jface.text.source.SourceViewer;
-import org.eclipse.jface.text.tests.util.DisplayHelper;
+
+import org.eclipse.ui.tests.harness.util.DisplayHelper;
 
 public class AsyncContentAssistTest {
 
@@ -117,7 +118,7 @@ public void testCompletePrefix() {
 		contentAssistant.enablePrefixCompletion(true);
 		contentAssistant.install(viewer);
 		shell.open();
-		DisplayHelper.driveEventQueue(shell.getDisplay());
+		DisplayHelper.runEventLoop(shell.getDisplay(), 0);
 		Display display= shell.getDisplay();
 		final Collection<Shell> beforeShells= AbstractContentAssistTest.getCurrentShells();
 		contentAssistant.showPossibleCompletions();

tests/org.eclipse.jface.text.tests/src/org/eclipse/jface/text/tests/contentassist/FilteringAsyncContentAssistTests.java

@@ -50,7 +50,8 @@
 import org.eclipse.jface.text.contentassist.IContextInformation;
 import org.eclipse.jface.text.contentassist.IContextInformationValidator;
 import org.eclipse.jface.text.source.SourceViewer;
-import org.eclipse.jface.text.tests.util.DisplayHelper;
+
+import org.eclipse.ui.tests.harness.util.DisplayHelper;
 
 /**
  * Tests for Async completion proposal popup proposals filtering mechanics
@@ -70,7 +71,7 @@ public void setup() {
 		shell = new Shell();
 		shell.setSize(300, 300);
 		shell.open();
-		DisplayHelper.driveEventQueue(shell.getDisplay());
+		DisplayHelper.runEventLoop(shell.getDisplay(), 0);
 
 		viewer = new SourceViewer(shell, null, SWT.NONE);
 		Document document = new Document();

tests/org.eclipse.jface.text.tests/src/org/eclipse/jface/text/tests/contentassist/IncrementalAsyncContentAssistTests.java

@@ -28,7 +28,8 @@
 import org.eclipse.jface.text.contentassist.ContentAssistant;
 import org.eclipse.jface.text.contentassist.ICompletionProposal;
 import org.eclipse.jface.text.source.SourceViewer;
-import org.eclipse.jface.text.tests.util.DisplayHelper;
+
+import org.eclipse.ui.tests.harness.util.DisplayHelper;
 
 public class IncrementalAsyncContentAssistTests {
 
@@ -45,7 +46,7 @@ public void setup() {
 		shell= new Shell();
 		shell.setSize(300, 300);
 		shell.open();
-		DisplayHelper.driveEventQueue(shell.getDisplay());
+		DisplayHelper.runEventLoop(shell.getDisplay(), 0);
 
 		viewer= new SourceViewer(shell, null, SWT.NONE);
 		Document document= new Document();