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diff --git a/org.eclipse.ui.workbench.texteditor/src/org/eclipse/ui/texteditor/ContentAssistAction.java b/org.eclipse.ui.workbench.texteditor/src/org/eclipse/ui/texteditor/ContentAssistAction.java
new file mode 100644
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+/**********************************************************************
+Copyright (c) 2000, 2002 IBM Corp. and others.
+All rights reserved. This program and the accompanying materials
+are made available under the terms of the Common Public License v1.0
+which accompanies this distribution, and is available at
+http://www.eclipse.org/legal/cpl-v10.html
+
+Contributors:
+    IBM Corporation - Initial implementation
+**********************************************************************/
+
+package org.eclipse.ui.texteditor;
+
+
+import java.util.ResourceBundle;
+
+import org.eclipse.swt.custom.BusyIndicator;
+import org.eclipse.swt.widgets.Display;
+import org.eclipse.swt.widgets.Shell;
+
+import org.eclipse.jface.text.ITextOperationTarget;
+import org.eclipse.jface.text.ITextOperationTargetExtension;
+import org.eclipse.jface.text.source.ISourceViewer;
+
+import org.eclipse.ui.IWorkbenchPartSite;
+
+
+/**
+ * A content asisst action which gets its target from its text editor.
+ * <p>
+ * The action is initially associated with a text editor via the constructor,
+ * but can subsequently be changed using <code>setEditor</code>.
+ * </p>
+ * <p>
+ * If this class is used as is, it works by asking the text editor for its text operation target
+ * (using <code>getAdapter(ITextOperationTarget.class)</code> and runs the content assist
+ * operation on this target.
+ * </p>
+ * @since 2.0
+ */
+public final class ContentAssistAction extends TextEditorAction {
+	
+	/** The text operation target */
+	private ITextOperationTarget fOperationTarget;
+	
+	/**
+	 * Creates and initializes the action for the given text editor.
+	 * The action configures its visual representation from the given resource
+	 * bundle. The action works by asking the text editor at the time for its 
+	 * text operation target adapter (using
+	 * <code>getAdapter(ITextOperationTarget.class)</code>. The action runs the
+	 * content assist operation on this target.
+	 *
+	 * @param bundle the resource bundle
+	 * @param prefix a prefix to be prepended to the various resource keys
+	 *   (described in <code>ResourceAction</code> constructor), or 
+	 *   <code>null</code> if none
+	 * @param editor the text editor
+	 * @see ResourceAction#ResourceAction
+	 */
+	public ContentAssistAction(ResourceBundle bundle, String prefix, ITextEditor editor) {
+		super(bundle, prefix, editor);
+		update();
+	}
+	
+	/**
+	 * Runs the content assist operation on the editor's text operation target.
+	 */
+	public void run() {
+		if (fOperationTarget != null) {
+			
+			ITextEditor editor= getTextEditor();
+			if (editor != null) {
+				
+				Display display= null;
+				
+				IWorkbenchPartSite site= editor.getSite();
+				Shell shell= site.getShell();
+				if (shell != null && !shell.isDisposed()) 
+					display= shell.getDisplay();
+			
+				BusyIndicator.showWhile(display, new Runnable() {
+					public void run() {
+						fOperationTarget.doOperation(ISourceViewer.CONTENTASSIST_PROPOSALS);
+					}
+				});
+			}
+		}
+	}
+	
+	/**
+	 * The <code>ContentAssistAction</code> implementation of this 
+	 * <code>IUpdate</code> method discovers the operation through the current
+	 * editor's <code>ITextOperationTarget</code> adapter, and sets the
+	 * enabled state accordingly.
+	 */
+	public void update() {
+		
+		ITextEditor editor= getTextEditor();
+
+		if (fOperationTarget == null && editor!= null)
+			fOperationTarget= (ITextOperationTarget) editor.getAdapter(ITextOperationTarget.class);
+		
+		if (fOperationTarget == null) {
+			setEnabled(false);
+			return;
+		}
+		
+		if (editor instanceof ITextEditorExtension && fOperationTarget instanceof ITextOperationTargetExtension) {
+			ITextEditorExtension extension= (ITextEditorExtension) editor;
+			ITextOperationTargetExtension targetExtension= (ITextOperationTargetExtension) fOperationTarget;
+			boolean isEnabled= !extension.isEditorInputReadOnly();
+			targetExtension.enableOperation(ISourceViewer.CONTENTASSIST_PROPOSALS, isEnabled);
+		}
+		
+		setEnabled(fOperationTarget.canDoOperation(ISourceViewer.CONTENTASSIST_PROPOSALS));
+	}
+	
+	/*
+	 * @see TextEditorAction#setEditor(ITextEditor)
+	 */
+	public void setEditor(ITextEditor editor) {
+		super.setEditor(editor);
+		fOperationTarget= null;
+	}
+}