org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/text/java/hover/NLSStringHover.java - jdt/eclipse.jdt.ui - Git at Google

 /*******************************************************************************
  * Copyright (c) 2000, 2022 IBM Corporation and others.
  *
  * This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License 2.0
  * which accompanies this distribution, and is available at
  * https://www.eclipse.org/legal/epl-2.0/
  *
  * SPDX-License-Identifier: EPL-2.0
  *
  * Contributors:
  *     IBM Corporation - initial API and implementation
  *******************************************************************************/
 package org.eclipse.jdt.internal.ui.text.java.hover;

 import java.util.Properties;

 import org.eclipse.swt.SWT;
 import org.eclipse.swt.widgets.Shell;

 import org.eclipse.core.runtime.Assert;

 import org.eclipse.core.resources.IStorage;

 import org.eclipse.jface.action.Action;
 import org.eclipse.jface.action.ToolBarManager;
 import org.eclipse.jface.internal.text.html.HTMLPrinter;

 import org.eclipse.jface.text.AbstractReusableInformationControlCreator;
 import org.eclipse.jface.text.DefaultInformationControl;
 import org.eclipse.jface.text.IInformationControl;
 import org.eclipse.jface.text.IInformationControlCreator;
 import org.eclipse.jface.text.IInformationControlExtension2;
 import org.eclipse.jface.text.IRegion;
 import org.eclipse.jface.text.ITextViewer;
 import org.eclipse.jface.text.Region;

 import org.eclipse.ui.IEditorPart;

 import org.eclipse.ui.editors.text.EditorsUI;

 import org.eclipse.jdt.core.IField;
 import org.eclipse.jdt.core.IType;
 import org.eclipse.jdt.core.ITypeRoot;
 import org.eclipse.jdt.core.JavaModelException;
 import org.eclipse.jdt.core.Signature;
 import org.eclipse.jdt.core.dom.ASTNode;
 import org.eclipse.jdt.core.dom.CompilationUnit;
 import org.eclipse.jdt.core.dom.IBinding;
 import org.eclipse.jdt.core.dom.ITypeBinding;
 import org.eclipse.jdt.core.dom.IVariableBinding;
 import org.eclipse.jdt.core.dom.NodeFinder;
 import org.eclipse.jdt.core.dom.QualifiedName;
 import org.eclipse.jdt.core.dom.SimpleName;
 import org.eclipse.jdt.core.dom.StringLiteral;
 import org.eclipse.jdt.core.dom.TypeDeclaration;
 import org.eclipse.jdt.core.manipulation.SharedASTProviderCore;

 import org.eclipse.jdt.internal.core.manipulation.dom.ASTResolving;
 import org.eclipse.jdt.internal.corext.refactoring.nls.AccessorClassReference;
 import org.eclipse.jdt.internal.corext.refactoring.nls.NLSHintHelper;

 import org.eclipse.jdt.internal.ui.JavaPluginImages;
 import org.eclipse.jdt.internal.ui.javaeditor.JavaEditor;
 import org.eclipse.jdt.internal.ui.javaeditor.NLSKeyHyperlink;


 /**
  * Provides externalized string as hover info for NLS key.
  *
  * @since 3.1
  */
 public class NLSStringHover extends AbstractJavaEditorTextHover {


 	/*
 	 * @see org.eclipse.jdt.internal.ui.text.java.hover.AbstractJavaEditorTextHover#getHoverRegion(org.eclipse.jface.text.ITextViewer, int)
 	 */
 	@Override
 	public IRegion getHoverRegion(ITextViewer textViewer, int offset) {
 		if (!(getEditor() instanceof JavaEditor))
 			return null;

 		ITypeRoot je= getEditorInputJavaElement();
 		if (je == null)
 			return null;

 		// Never wait for an AST in UI thread.
 		CompilationUnit ast= SharedASTProviderCore.getAST(je, SharedASTProviderCore.WAIT_NO, null);
 		if (ast == null)
 			return null;

 		ASTNode node= NodeFinder.perform(ast, offset, 1);
 		if (node instanceof StringLiteral) {
 			StringLiteral stringLiteral= (StringLiteral)node;
 			return new Region(stringLiteral.getStartPosition(), stringLiteral.getLength());
 		} else if (node instanceof SimpleName) {
 			SimpleName simpleName= (SimpleName)node;
 			return new Region(simpleName.getStartPosition(), simpleName.getLength());
 		}

 		return null;
 	}

 	/**
 	 * @deprecated see {@link org.eclipse.jface.text.ITextHover#getHoverInfo(ITextViewer, IRegion)}
 	 */
 	@Deprecated
 	@Override
 	public String getHoverInfo(ITextViewer textViewer, IRegion hoverRegion) {
 		NLSHoverControlInput info= internalGetHoverInfo(textViewer, hoverRegion);
 		return info == null ? null : info.fInformation;
 	}

 	/*
 	 * @see org.eclipse.jface.text.ITextHoverExtension2#getHoverInfo2(org.eclipse.jface.text.ITextViewer, org.eclipse.jface.text.IRegion)
 	 */
 	@Override
 	public Object getHoverInfo2(ITextViewer textViewer, IRegion hoverRegion) {
 		return internalGetHoverInfo(textViewer, hoverRegion);
 	}

 	/**
 	 * Returns the hover input.
 	 *
 	 * @param textViewer the viewer on which the hover popup should be shown
 	 * @param hoverRegion the text range in the viewer which is used to determine the hover display
 	 *            information
 	 * @return the hover popup display input, or <code>null</code> if none available
 	 *
 	 * @see #getHoverInfo2(ITextViewer, IRegion)
 	 */
 	private NLSHoverControlInput internalGetHoverInfo(ITextViewer textViewer, IRegion hoverRegion) {
 		if (!(getEditor() instanceof JavaEditor))
 			return null;

 		ITypeRoot je= getEditorInputJavaElement();
 		if (je == null)
 			return null;

 		CompilationUnit ast= SharedASTProviderCore.getAST(je, SharedASTProviderCore.WAIT_ACTIVE_ONLY, null);
 		if (ast == null)
 			return null;

 		ASTNode node= NodeFinder.perform(ast, hoverRegion.getOffset(), hoverRegion.getLength());
 		if (!(node instanceof StringLiteral) && !(node instanceof SimpleName))
 			return null;

 		if (node.getLocationInParent() == QualifiedName.QUALIFIER_PROPERTY)
 			return null;

 		boolean usedFullyQualifiedName= false;
 		IBinding containingClassBinding= null;
 		ASTNode containingClass= ASTResolving.findParentType(node);
 		if (containingClass instanceof TypeDeclaration) {
 			containingClassBinding= ((TypeDeclaration)containingClass).resolveBinding();
 			ASTNode parentNode= node.getParent();
 			if (parentNode instanceof QualifiedName) {
 				IBinding qualifierBinding= (((QualifiedName)parentNode).getQualifier()).resolveBinding();
 				if (qualifierBinding != null && containingClassBinding != null) {
 					usedFullyQualifiedName= qualifierBinding.getKey().equals(containingClassBinding.getKey());
 				}
 			}
 		}
 		AccessorClassReference ref= NLSHintHelper.getAccessorClassReference(ast, hoverRegion, usedFullyQualifiedName);
 		if (ref == null)
 			return null;

 		String identifier= null;
 		if (node instanceof StringLiteral) {
 			identifier= ((StringLiteral)node).getLiteralValue();
 		} else if (!usedFullyQualifiedName && node.getLocationInParent() == QualifiedName.NAME_PROPERTY) {
 			identifier= ((SimpleName)node).getIdentifier();
 			IBinding nodeBinding= ((SimpleName)node).resolveBinding();
 			if (nodeBinding != null) {
 				if (nodeBinding instanceof IVariableBinding && ((IVariableBinding)nodeBinding).isField()) {
 					ITypeBinding nodeDeclaringType= ((IVariableBinding)nodeBinding).getDeclaringClass();
 					if (nodeDeclaringType != null) {
 						ITypeBinding superClass= nodeDeclaringType.getSuperclass();
 						if (superClass != null) {
 							String superClassName= superClass.getQualifiedName();
 							if (!"org.eclipse.osgi.util.NLS".equals(superClassName)) { //$NON-NLS-1$
 								identifier= null;
 							}
 						}
 					}
 				}
 			}
 		}
 		if (identifier == null) {
 			try {
 				if (containingClassBinding == null)
 					return null;
 				IType parentType= (IType)containingClassBinding.getJavaElement();
 				if (parentType == null)
 					return null;
 				String varName= ((SimpleName)node).getIdentifier();
 				IField field= parentType.getField(varName);
 				if (!"String".equals(Signature.getSignatureSimpleName(field.getTypeSignature()))) //$NON-NLS-1$
 					return null;
 				Object obj= field.getConstant();
 				identifier= obj instanceof String ? ((String)obj).substring(1, ((String)obj).length() - 1) : null;
 			} catch (JavaModelException e) {
 				return null;
 			}
 		}
 		if (identifier == null)
 			return null;

 		IStorage propertiesFile;
 		try {
 			propertiesFile= NLSHintHelper.getResourceBundle(je.getJavaProject(), ref);
 			if (propertiesFile == null)
 				return new NLSHoverControlInput(toHtml(JavaHoverMessages.NLSStringHover_NLSStringHover_PropertiesFileNotDetectedWarning, "", null, false), (IStorage)null, "", getEditor()); //$NON-NLS-1$ //$NON-NLS-2$
 		} catch (JavaModelException ex) {
 			return null;
 		}

 		final String propertiesFileName= propertiesFile.getName();
 		Properties properties= null;
 		try {
 			properties= NLSHintHelper.getProperties(propertiesFile);
 		} catch (IllegalArgumentException e) {
 			return new NLSHoverControlInput(toHtml(propertiesFileName, JavaHoverMessages.NLSStringHover_NLSStringHover_PropertiesFileCouldNotBeReadWarning, e.getLocalizedMessage(), false),
 					propertiesFile, identifier, getEditor());
 		}
 		if (properties == null)
 			return null;
 		if (properties.isEmpty())
 			return new NLSHoverControlInput(toHtml(propertiesFileName, JavaHoverMessages.NLSStringHover_NLSStringHover_missingKeyWarning, null, false), propertiesFile, "", getEditor()); //$NON-NLS-1$

 		String value= properties.getProperty(identifier, null);
 		String buffer= toHtml(propertiesFileName, value, null, true);
 		return new NLSHoverControlInput(buffer, propertiesFile, identifier, getEditor());
 	}

 	private String toHtml(String header, String string, String errorString, boolean addPreFormatted) {
 		StringBuilder buffer= new StringBuilder();
 		HTMLPrinter.addSmallHeader(buffer, header);

 		if (string != null) {
 			if (addPreFormatted) {
 				HTMLPrinter.addParagraph(buffer, ""); //$NON-NLS-1$
 				HTMLPrinter.addPreFormatted(buffer, HTMLPrinter.convertToHTMLContent(string));
 			} else {
 				HTMLPrinter.addParagraph(buffer, string);
 			}
 			if (errorString != null) {
 				HTMLPrinter.addParagraph(buffer, errorString);
 			}
 		} else {
 			HTMLPrinter.addParagraph(buffer, JavaHoverMessages.NLSStringHover_NLSStringHover_missingKeyWarning);
 		}

 		HTMLPrinter.insertPageProlog(buffer, 0);
 		HTMLPrinter.addPageEpilog(buffer);
 		return buffer.toString();
 	}

 	/**
 	 * The input for NLS hover.
 	 *
 	 * @since 3.5
 	 */
 	private static class NLSHoverControlInput {

 		private IStorage fpropertiesFile;
 		private String fKeyName;
 		private String fInformation;
 		private IEditorPart fActiveEditor;

 		/**
 		 * Creates the NLS hover input.
 		 *
 		 * @param information the hover info (string with simple HTML)
 		 * @param propertiesFile the properties file, or <code>null</code> if not found
 		 * @param key the NLS key
 		 * @param editor the active editor part
 		 */
 		public NLSHoverControlInput(String information, IStorage propertiesFile, String key, IEditorPart editor) {
 			fInformation= information;
 			fpropertiesFile= propertiesFile;
 			fKeyName= key;
 			fActiveEditor= editor;
 		}
 	}

 	/**
 	 * The NLS hover control.
 	 *
 	 * @since 3.5
 	 */
 	static class NLSHoverControl extends DefaultInformationControl implements IInformationControlExtension2 {

 		/**
 		 * The NLS control input.
 		 */
 		private NLSHoverControlInput fInput;

 		/**
 		 * Creates a resizable NLS hover control with the given shell as parent.
 		 *
 		 * @param parent the parent shell
 		 * @param tbm the toolbar manager or <code>null</code> if toolbar is not desired
 		 */
 		public NLSHoverControl(Shell parent, ToolBarManager tbm) {
 			super(parent, tbm);

 		}

 		/**
 		 * Creates an NLS hover control with the given shell as parent.
 		 *
 		 * @param parent the parent shell
 		 * @param tooltipAffordanceString the text to be used in the status field or
 		 *            <code>null</code> to hide the status field
 		 */
 		public NLSHoverControl(Shell parent, String tooltipAffordanceString) {
 			super(parent, tooltipAffordanceString);
 		}

 		/**
 		 * {@inheritDoc} This control can handle {@link NLSStringHover.NLSHoverControlInput}.
 		 */
 		@Override
 		public void setInput(Object input) {
 			Assert.isLegal(input instanceof NLSHoverControlInput);

 			NLSHoverControlInput info= (NLSHoverControlInput)input;
 			setInformation(info.fInformation);
 			fInput= info;
 		}

 		/**
 		 * Returns the control input.
 		 *
 		 * @return the control input
 		 */
 		public NLSHoverControlInput getInput() {
 			return fInput;
 		}
 	}

 	/**
 	 * Presenter control creator.
 	 *
 	 * @since 3.5
 	 */
 	private static final class PresenterControlCreator extends AbstractReusableInformationControlCreator {
 		/*
 		 * @see org.eclipse.jdt.internal.ui.text.java.hover.AbstractReusableInformationControlCreator#doCreateInformationControl(org.eclipse.swt.widgets.Shell)
 		 */
 		@Override
 		public IInformationControl doCreateInformationControl(Shell parent) {
 			ToolBarManager tbm= new ToolBarManager(SWT.FLAT);
 			NLSHoverControl iControl= new NLSHoverControl(parent, tbm);
 			OpenPropertiesFileAction openPropertiesFileAction= new OpenPropertiesFileAction(iControl);
 			tbm.add(openPropertiesFileAction);
 			tbm.update(true);
 			return iControl;
 		}
 	}

 	/**
 	 * Hover control creator.
 	 *
 	 * @since 3.5
 	 */
 	private static final class HoverControlCreator extends AbstractReusableInformationControlCreator {

 		/**
 		 * The presenter control creator.
 		 */
 		private final IInformationControlCreator fPresenterControlCreator;

 		/**
 		 * Creates the hover control creator.
 		 *
 		 * @param presenterControlCreator the presenter control creator
 		 */
 		public HoverControlCreator(IInformationControlCreator presenterControlCreator) {
 			fPresenterControlCreator= presenterControlCreator;
 		}

 		/*
 		 * @see org.eclipse.jdt.internal.ui.text.java.hover.AbstractReusableInformationControlCreator#doCreateInformationControl(org.eclipse.swt.widgets.Shell)
 		 */
 		@Override
 		public IInformationControl doCreateInformationControl(Shell parent) {
 			return new NLSHoverControl(parent, EditorsUI.getTooltipAffordanceString()) {
 				/*
 				 * @see org.eclipse.jface.text.IInformationControlExtension5#getInformationPresenterControlCreator()
 				 */
 				@Override
 				public IInformationControlCreator getInformationPresenterControlCreator() {
 					return fPresenterControlCreator;
 				}
 			};
 		}
 	}

 	/**
 	 * The hover control creator.
 	 *
 	 * @since 3.5
 	 */
 	private IInformationControlCreator fHoverControlCreator;

 	/**
 	 * The presentation control creator.
 	 *
 	 * @since 3.5
 	 */
 	private IInformationControlCreator fPresenterControlCreator;

 	/*
 	 * @see ITextHoverExtension#getHoverControlCreator()
 	 * @since 3.5
 	 */
 	@Override
 	public IInformationControlCreator getHoverControlCreator() {
 		if (fHoverControlCreator == null)
 			fHoverControlCreator= new HoverControlCreator(getInformationPresenterControlCreator());
 		return fHoverControlCreator;
 	}

 	/*
 	 * @see org.eclipse.jdt.internal.ui.text.java.hover.AbstractJavaEditorTextHover#getInformationPresenterControlCreator()
 	 * @since 3.5
 	 */
 	@Override
 	public IInformationControlCreator getInformationPresenterControlCreator() {
 		if (fPresenterControlCreator == null)
 			fPresenterControlCreator= new PresenterControlCreator();
 		return fPresenterControlCreator;
 	}


 	/**
 	 * Action that opens the current hover NLS string in properties file.
 	 *
 	 * @since 3.5
 	 */
 	private static final class OpenPropertiesFileAction extends Action {

 		/**
 		 * The NLS hover control.
 		 */
 		private NLSHoverControl fControl;

 		/**
 		 * Creates the action for opening properties file.
 		 *
 		 * @param control the NLS hover control
 		 */
 		public OpenPropertiesFileAction(NLSHoverControl control) {
 			fControl= control;
 			setText(JavaHoverMessages.NLSStringHover_open_in_properties_file);
 			JavaPluginImages.setLocalImageDescriptors(this, "goto_input.png"); //$NON-NLS-1$
 		}

 		/*
 		 * @see org.eclipse.jface.action.Action#run()
 		 */
 		@Override
 		public void run() {
 			NLSHoverControlInput input= fControl.getInput();
 			NLSKeyHyperlink.openKeyInPropertiesFile(input.fKeyName, input.fpropertiesFile, input.fActiveEditor);
 		}
 	}
 }
	/*******************************************************************************
	* Copyright (c) 2000, 2022 IBM Corporation and others.
	*
	* This program and the accompanying materials
	* are made available under the terms of the Eclipse Public License 2.0
	* which accompanies this distribution, and is available at
	* https://www.eclipse.org/legal/epl-2.0/
	*
	* SPDX-License-Identifier: EPL-2.0
	*
	* Contributors:
	* IBM Corporation - initial API and implementation
	*******************************************************************************/
	package org.eclipse.jdt.internal.ui.text.java.hover;

	import java.util.Properties;

	import org.eclipse.swt.SWT;
	import org.eclipse.swt.widgets.Shell;

	import org.eclipse.core.runtime.Assert;

	import org.eclipse.core.resources.IStorage;

	import org.eclipse.jface.action.Action;
	import org.eclipse.jface.action.ToolBarManager;
	import org.eclipse.jface.internal.text.html.HTMLPrinter;

	import org.eclipse.jface.text.AbstractReusableInformationControlCreator;
	import org.eclipse.jface.text.DefaultInformationControl;
	import org.eclipse.jface.text.IInformationControl;
	import org.eclipse.jface.text.IInformationControlCreator;
	import org.eclipse.jface.text.IInformationControlExtension2;
	import org.eclipse.jface.text.IRegion;
	import org.eclipse.jface.text.ITextViewer;
	import org.eclipse.jface.text.Region;

	import org.eclipse.ui.IEditorPart;

	import org.eclipse.ui.editors.text.EditorsUI;

	import org.eclipse.jdt.core.IField;
	import org.eclipse.jdt.core.IType;
	import org.eclipse.jdt.core.ITypeRoot;
	import org.eclipse.jdt.core.JavaModelException;
	import org.eclipse.jdt.core.Signature;
	import org.eclipse.jdt.core.dom.ASTNode;
	import org.eclipse.jdt.core.dom.CompilationUnit;
	import org.eclipse.jdt.core.dom.IBinding;
	import org.eclipse.jdt.core.dom.ITypeBinding;
	import org.eclipse.jdt.core.dom.IVariableBinding;
	import org.eclipse.jdt.core.dom.NodeFinder;
	import org.eclipse.jdt.core.dom.QualifiedName;
	import org.eclipse.jdt.core.dom.SimpleName;
	import org.eclipse.jdt.core.dom.StringLiteral;
	import org.eclipse.jdt.core.dom.TypeDeclaration;
	import org.eclipse.jdt.core.manipulation.SharedASTProviderCore;

	import org.eclipse.jdt.internal.core.manipulation.dom.ASTResolving;
	import org.eclipse.jdt.internal.corext.refactoring.nls.AccessorClassReference;
	import org.eclipse.jdt.internal.corext.refactoring.nls.NLSHintHelper;

	import org.eclipse.jdt.internal.ui.JavaPluginImages;
	import org.eclipse.jdt.internal.ui.javaeditor.JavaEditor;
	import org.eclipse.jdt.internal.ui.javaeditor.NLSKeyHyperlink;


	/**
	* Provides externalized string as hover info for NLS key.
	*
	* @since 3.1
	*/
	public class NLSStringHover extends AbstractJavaEditorTextHover {


	/*
	* @see org.eclipse.jdt.internal.ui.text.java.hover.AbstractJavaEditorTextHover#getHoverRegion(org.eclipse.jface.text.ITextViewer, int)
	*/
	@Override
	public IRegion getHoverRegion(ITextViewer textViewer, int offset) {
	if (!(getEditor() instanceof JavaEditor))
	return null;

	ITypeRoot je= getEditorInputJavaElement();
	if (je == null)
	return null;

	// Never wait for an AST in UI thread.
	CompilationUnit ast= SharedASTProviderCore.getAST(je, SharedASTProviderCore.WAIT_NO, null);
	if (ast == null)
	return null;

	ASTNode node= NodeFinder.perform(ast, offset, 1);
	if (node instanceof StringLiteral) {
	StringLiteral stringLiteral= (StringLiteral)node;
	return new Region(stringLiteral.getStartPosition(), stringLiteral.getLength());
	} else if (node instanceof SimpleName) {
	SimpleName simpleName= (SimpleName)node;
	return new Region(simpleName.getStartPosition(), simpleName.getLength());
	}

	return null;
	}

	/**
	* @deprecated see {@link org.eclipse.jface.text.ITextHover#getHoverInfo(ITextViewer, IRegion)}
	*/
	@Deprecated
	@Override
	public String getHoverInfo(ITextViewer textViewer, IRegion hoverRegion) {
	NLSHoverControlInput info= internalGetHoverInfo(textViewer, hoverRegion);
	return info == null ? null : info.fInformation;
	}

	/*
	* @see org.eclipse.jface.text.ITextHoverExtension2#getHoverInfo2(org.eclipse.jface.text.ITextViewer, org.eclipse.jface.text.IRegion)
	*/
	@Override
	public Object getHoverInfo2(ITextViewer textViewer, IRegion hoverRegion) {
	return internalGetHoverInfo(textViewer, hoverRegion);
	}

	/**
	* Returns the hover input.
	*
	* @param textViewer the viewer on which the hover popup should be shown
	* @param hoverRegion the text range in the viewer which is used to determine the hover display
	* information
	* @return the hover popup display input, or <code>null</code> if none available
	*
	* @see #getHoverInfo2(ITextViewer, IRegion)
	*/
	private NLSHoverControlInput internalGetHoverInfo(ITextViewer textViewer, IRegion hoverRegion) {
	if (!(getEditor() instanceof JavaEditor))
	return null;

	ITypeRoot je= getEditorInputJavaElement();
	if (je == null)
	return null;

	CompilationUnit ast= SharedASTProviderCore.getAST(je, SharedASTProviderCore.WAIT_ACTIVE_ONLY, null);
	if (ast == null)
	return null;

	ASTNode node= NodeFinder.perform(ast, hoverRegion.getOffset(), hoverRegion.getLength());
	if (!(node instanceof StringLiteral) && !(node instanceof SimpleName))
	return null;

	if (node.getLocationInParent() == QualifiedName.QUALIFIER_PROPERTY)
	return null;

	boolean usedFullyQualifiedName= false;
	IBinding containingClassBinding= null;
	ASTNode containingClass= ASTResolving.findParentType(node);
	if (containingClass instanceof TypeDeclaration) {
	containingClassBinding= ((TypeDeclaration)containingClass).resolveBinding();
	ASTNode parentNode= node.getParent();
	if (parentNode instanceof QualifiedName) {
	IBinding qualifierBinding= (((QualifiedName)parentNode).getQualifier()).resolveBinding();
	if (qualifierBinding != null && containingClassBinding != null) {
	usedFullyQualifiedName= qualifierBinding.getKey().equals(containingClassBinding.getKey());
	}
	}
	}
	AccessorClassReference ref= NLSHintHelper.getAccessorClassReference(ast, hoverRegion, usedFullyQualifiedName);
	if (ref == null)
	return null;

	String identifier= null;
	if (node instanceof StringLiteral) {
	identifier= ((StringLiteral)node).getLiteralValue();
	} else if (!usedFullyQualifiedName && node.getLocationInParent() == QualifiedName.NAME_PROPERTY) {
	identifier= ((SimpleName)node).getIdentifier();
	IBinding nodeBinding= ((SimpleName)node).resolveBinding();
	if (nodeBinding != null) {
	if (nodeBinding instanceof IVariableBinding && ((IVariableBinding)nodeBinding).isField()) {
	ITypeBinding nodeDeclaringType= ((IVariableBinding)nodeBinding).getDeclaringClass();
	if (nodeDeclaringType != null) {
	ITypeBinding superClass= nodeDeclaringType.getSuperclass();
	if (superClass != null) {
	String superClassName= superClass.getQualifiedName();
	if (!"org.eclipse.osgi.util.NLS".equals(superClassName)) { //$NON-NLS-1$
	identifier= null;
	}
	}
	}
	}
	}
	}
	if (identifier == null) {
	try {
	if (containingClassBinding == null)
	return null;
	IType parentType= (IType)containingClassBinding.getJavaElement();
	if (parentType == null)
	return null;
	String varName= ((SimpleName)node).getIdentifier();
	IField field= parentType.getField(varName);
	if (!"String".equals(Signature.getSignatureSimpleName(field.getTypeSignature()))) //$NON-NLS-1$
	return null;
	Object obj= field.getConstant();
	identifier= obj instanceof String ? ((String)obj).substring(1, ((String)obj).length() - 1) : null;
	} catch (JavaModelException e) {
	return null;
	}
	}
	if (identifier == null)
	return null;

	IStorage propertiesFile;
	try {
	propertiesFile= NLSHintHelper.getResourceBundle(je.getJavaProject(), ref);
	if (propertiesFile == null)
	return new NLSHoverControlInput(toHtml(JavaHoverMessages.NLSStringHover_NLSStringHover_PropertiesFileNotDetectedWarning, "", null, false), (IStorage)null, "", getEditor()); //$NON-NLS-1$ //$NON-NLS-2$
	} catch (JavaModelException ex) {
	return null;
	}

	final String propertiesFileName= propertiesFile.getName();
	Properties properties= null;
	try {
	properties= NLSHintHelper.getProperties(propertiesFile);
	} catch (IllegalArgumentException e) {
	return new NLSHoverControlInput(toHtml(propertiesFileName, JavaHoverMessages.NLSStringHover_NLSStringHover_PropertiesFileCouldNotBeReadWarning, e.getLocalizedMessage(), false),
	propertiesFile, identifier, getEditor());
	}
	if (properties == null)
	return null;
	if (properties.isEmpty())
	return new NLSHoverControlInput(toHtml(propertiesFileName, JavaHoverMessages.NLSStringHover_NLSStringHover_missingKeyWarning, null, false), propertiesFile, "", getEditor()); //$NON-NLS-1$

	String value= properties.getProperty(identifier, null);
	String buffer= toHtml(propertiesFileName, value, null, true);
	return new NLSHoverControlInput(buffer, propertiesFile, identifier, getEditor());
	}

	private String toHtml(String header, String string, String errorString, boolean addPreFormatted) {
	StringBuilder buffer= new StringBuilder();
	HTMLPrinter.addSmallHeader(buffer, header);

	if (string != null) {
	if (addPreFormatted) {
	HTMLPrinter.addParagraph(buffer, ""); //$NON-NLS-1$
	HTMLPrinter.addPreFormatted(buffer, HTMLPrinter.convertToHTMLContent(string));
	} else {
	HTMLPrinter.addParagraph(buffer, string);
	}
	if (errorString != null) {
	HTMLPrinter.addParagraph(buffer, errorString);
	}
	} else {
	HTMLPrinter.addParagraph(buffer, JavaHoverMessages.NLSStringHover_NLSStringHover_missingKeyWarning);
	}

	HTMLPrinter.insertPageProlog(buffer, 0);
	HTMLPrinter.addPageEpilog(buffer);
	return buffer.toString();
	}

	/**
	* The input for NLS hover.
	*
	* @since 3.5
	*/
	private static class NLSHoverControlInput {

	private IStorage fpropertiesFile;
	private String fKeyName;
	private String fInformation;
	private IEditorPart fActiveEditor;

	/**
	* Creates the NLS hover input.
	*
	* @param information the hover info (string with simple HTML)
	* @param propertiesFile the properties file, or <code>null</code> if not found
	* @param key the NLS key
	* @param editor the active editor part
	*/
	public NLSHoverControlInput(String information, IStorage propertiesFile, String key, IEditorPart editor) {
	fInformation= information;
	fpropertiesFile= propertiesFile;
	fKeyName= key;
	fActiveEditor= editor;
	}
	}

	/**
	* The NLS hover control.
	*
	* @since 3.5
	*/
	static class NLSHoverControl extends DefaultInformationControl implements IInformationControlExtension2 {

	/**
	* The NLS control input.
	*/
	private NLSHoverControlInput fInput;

	/**
	* Creates a resizable NLS hover control with the given shell as parent.
	*
	* @param parent the parent shell
	* @param tbm the toolbar manager or <code>null</code> if toolbar is not desired
	*/
	public NLSHoverControl(Shell parent, ToolBarManager tbm) {
	super(parent, tbm);

	}

	/**
	* Creates an NLS hover control with the given shell as parent.
	*
	* @param parent the parent shell
	* @param tooltipAffordanceString the text to be used in the status field or
	* <code>null</code> to hide the status field
	*/
	public NLSHoverControl(Shell parent, String tooltipAffordanceString) {
	super(parent, tooltipAffordanceString);
	}

	/**
	* {@inheritDoc} This control can handle {@link NLSStringHover.NLSHoverControlInput}.
	*/
	@Override
	public void setInput(Object input) {
	Assert.isLegal(input instanceof NLSHoverControlInput);

	NLSHoverControlInput info= (NLSHoverControlInput)input;
	setInformation(info.fInformation);
	fInput= info;
	}

	/**
	* Returns the control input.
	*
	* @return the control input
	*/
	public NLSHoverControlInput getInput() {
	return fInput;
	}
	}

	/**
	* Presenter control creator.
	*
	* @since 3.5
	*/
	private static final class PresenterControlCreator extends AbstractReusableInformationControlCreator {
	/*
	* @see org.eclipse.jdt.internal.ui.text.java.hover.AbstractReusableInformationControlCreator#doCreateInformationControl(org.eclipse.swt.widgets.Shell)
	*/
	@Override
	public IInformationControl doCreateInformationControl(Shell parent) {
	ToolBarManager tbm= new ToolBarManager(SWT.FLAT);
	NLSHoverControl iControl= new NLSHoverControl(parent, tbm);
	OpenPropertiesFileAction openPropertiesFileAction= new OpenPropertiesFileAction(iControl);
	tbm.add(openPropertiesFileAction);
	tbm.update(true);
	return iControl;
	}
	}

	/**
	* Hover control creator.
	*
	* @since 3.5
	*/
	private static final class HoverControlCreator extends AbstractReusableInformationControlCreator {

	/**
	* The presenter control creator.
	*/
	private final IInformationControlCreator fPresenterControlCreator;

	/**
	* Creates the hover control creator.
	*
	* @param presenterControlCreator the presenter control creator
	*/
	public HoverControlCreator(IInformationControlCreator presenterControlCreator) {
	fPresenterControlCreator= presenterControlCreator;
	}

	/*
	* @see org.eclipse.jdt.internal.ui.text.java.hover.AbstractReusableInformationControlCreator#doCreateInformationControl(org.eclipse.swt.widgets.Shell)
	*/
	@Override
	public IInformationControl doCreateInformationControl(Shell parent) {
	return new NLSHoverControl(parent, EditorsUI.getTooltipAffordanceString()) {
	/*
	* @see org.eclipse.jface.text.IInformationControlExtension5#getInformationPresenterControlCreator()
	*/
	@Override
	public IInformationControlCreator getInformationPresenterControlCreator() {
	return fPresenterControlCreator;
	}
	};
	}
	}

	/**
	* The hover control creator.
	*
	* @since 3.5
	*/
	private IInformationControlCreator fHoverControlCreator;

	/**
	* The presentation control creator.
	*
	* @since 3.5
	*/
	private IInformationControlCreator fPresenterControlCreator;

	/*
	* @see ITextHoverExtension#getHoverControlCreator()
	* @since 3.5
	*/
	@Override
	public IInformationControlCreator getHoverControlCreator() {
	if (fHoverControlCreator == null)
	fHoverControlCreator= new HoverControlCreator(getInformationPresenterControlCreator());
	return fHoverControlCreator;
	}

	/*
	* @see org.eclipse.jdt.internal.ui.text.java.hover.AbstractJavaEditorTextHover#getInformationPresenterControlCreator()
	* @since 3.5
	*/
	@Override
	public IInformationControlCreator getInformationPresenterControlCreator() {
	if (fPresenterControlCreator == null)
	fPresenterControlCreator= new PresenterControlCreator();
	return fPresenterControlCreator;
	}


	/**
	* Action that opens the current hover NLS string in properties file.
	*
	* @since 3.5
	*/
	private static final class OpenPropertiesFileAction extends Action {

	/**
	* The NLS hover control.
	*/
	private NLSHoverControl fControl;

	/**
	* Creates the action for opening properties file.
	*
	* @param control the NLS hover control
	*/
	public OpenPropertiesFileAction(NLSHoverControl control) {
	fControl= control;
	setText(JavaHoverMessages.NLSStringHover_open_in_properties_file);
	JavaPluginImages.setLocalImageDescriptors(this, "goto_input.png"); //$NON-NLS-1$
	}

	/*
	* @see org.eclipse.jface.action.Action#run()
	*/
	@Override
	public void run() {
	NLSHoverControlInput input= fControl.getInput();
	NLSKeyHyperlink.openKeyInPropertiesFile(input.fKeyName, input.fpropertiesFile, input.fActiveEditor);
	}
	}
	}