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

 /*******************************************************************************
  * Copyright (c) 2000, 2005 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/epl-v10.html
  *
  * Contributors:
  *     IBM Corporation - initial API and implementation
  *******************************************************************************/
 package org.eclipse.jdt.internal.ui.text;


 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;

 import org.eclipse.swt.SWT;
 import org.eclipse.swt.graphics.Color;
 import org.eclipse.swt.graphics.RGB;
 import org.eclipse.swt.widgets.Display;

 import org.eclipse.jface.preference.IPreferenceStore;
 import org.eclipse.jface.preference.PreferenceConverter;
 import org.eclipse.jface.resource.StringConverter;
 import org.eclipse.jface.text.TextAttribute;
 import org.eclipse.jface.text.rules.BufferedRuleBasedScanner;
 import org.eclipse.jface.text.rules.IRule;
 import org.eclipse.jface.text.rules.IToken;
 import org.eclipse.jface.text.rules.Token;
 import org.eclipse.jface.util.PropertyChangeEvent;

 import org.eclipse.jdt.ui.PreferenceConstants;
 import org.eclipse.jdt.ui.text.IColorManager;
 import org.eclipse.jdt.ui.text.IColorManagerExtension;


 /**
  * Initialized with a color manager and a preference store, its subclasses are
  * only responsible for providing a list of preference keys for based on which tokens
  * are generated and to use this tokens to define the rules controlling this scanner.
  * <p>
  * This scanner stores the color defined by the color preference key into
  * the color manager under the same key.
  * </p>
  * <p>
  * Preference color key + {@link PreferenceConstants#EDITOR_BOLD_SUFFIX} are used
  * to retrieve whether the token is rendered in bold.
  * </p>
  * <p>
  * Preference color key + {@link PreferenceConstants#EDITOR_ITALIC_SUFFIX} are used
  * to retrieve whether the token is rendered in italic.
  * </p>
  * <p>
  * Preference color key + {@link PreferenceConstants#EDITOR_STRIKETHROUGH_SUFFIX} are used
  * to retrieve whether the token is rendered in strikethrough.
  * </p>
  * <p>
  * Preference color key + {@link PreferenceConstants#EDITOR_UNDERLINE_SUFFIX} are used
  * to retrieve whether the token is rendered in underline.
  * </p>
  */
 public abstract class AbstractJavaScanner extends BufferedRuleBasedScanner {


 	private IColorManager fColorManager;
 	private IPreferenceStore fPreferenceStore;

 	private Map fTokenMap= new HashMap();
 	private String[] fPropertyNamesColor;
 	/**
 	 * Preference keys for boolean preferences which are <code>true</code>,
 	 * iff the corresponding token should be rendered bold.
 	 */
 	private String[] fPropertyNamesBold;
 	/**
 	 * Preference keys for boolean preferences which are <code>true</code>,
 	 * iff the corresponding token should be rendered italic.
 	 *
 	 * @since 3.0
 	 */
 	private String[] fPropertyNamesItalic;
 	/**
 	 * Preference keys for boolean preferences which are <code>true</code>,
 	 * iff the corresponding token should be rendered strikethrough.
 	 *
 	 * @since 3.1
 	 */
 	private String[] fPropertyNamesStrikethrough;
 	/**
 	 * Preference keys for boolean preferences which are <code>true</code>,
 	 * iff the corresponding token should be rendered underline.
 	 *
 	 * @since 3.1
 	 */
 	private String[] fPropertyNamesUnderline;


 	private boolean fNeedsLazyColorLoading;

 	/**
 	 * Returns an array of preference keys which define the tokens
 	 * used in the rules of this scanner.
 	 * <p>
 	 * The preference key is used access the color in the preference
 	 * store and in the color manager.
 	 * </p>
 	 * <p>
 	 * Preference key + {@link PreferenceConstants#EDITOR_BOLD_SUFFIX} is used
 	 * to retrieve whether the token is rendered in bold.
 	 * </p>
 	 * <p>
 	 * Preference key + {@link PreferenceConstants#EDITOR_ITALIC_SUFFIX} is used
 	 * to retrieve whether the token is rendered in italic.
 	 * </p>
 	 */
 	abstract protected String[] getTokenProperties();

 	/**
 	 * Creates the list of rules controlling this scanner.
 	 */
 	abstract protected List createRules();


 	/**
 	 * Creates an abstract Java scanner.
 	 */
 	public AbstractJavaScanner(IColorManager manager, IPreferenceStore store) {
 		super();
 		fColorManager= manager;
 		fPreferenceStore= store;
 	}

 	/**
 	 * Must be called after the constructor has been called.
 	 */
 	public final void initialize() {

 		fPropertyNamesColor= getTokenProperties();
 		int length= fPropertyNamesColor.length;
 		fPropertyNamesBold= new String[length];
 		fPropertyNamesItalic= new String[length];
 		fPropertyNamesStrikethrough= new String[length];
 		fPropertyNamesUnderline= new String[length];

 		fNeedsLazyColorLoading= Display.getCurrent() == null;

 		for (int i= 0; i < length; i++) {
 			fPropertyNamesBold[i]= fPropertyNamesColor[i] + PreferenceConstants.EDITOR_BOLD_SUFFIX;
 			fPropertyNamesItalic[i]= fPropertyNamesColor[i] + PreferenceConstants.EDITOR_ITALIC_SUFFIX;
 			fPropertyNamesStrikethrough[i]= fPropertyNamesColor[i] + PreferenceConstants.EDITOR_STRIKETHROUGH_SUFFIX;
 			fPropertyNamesUnderline[i]= fPropertyNamesColor[i] + PreferenceConstants.EDITOR_UNDERLINE_SUFFIX;
 			if (fNeedsLazyColorLoading)
 				addTokenWithProxyAttribute(fPropertyNamesColor[i], fPropertyNamesBold[i], fPropertyNamesItalic[i], fPropertyNamesStrikethrough[i], fPropertyNamesUnderline[i]);
 			else
 				addToken(fPropertyNamesColor[i], fPropertyNamesBold[i], fPropertyNamesItalic[i], fPropertyNamesStrikethrough[i], fPropertyNamesUnderline[i]);
 		}

 		initializeRules();
 	}

 	public IToken nextToken() {
 		if (fNeedsLazyColorLoading)
 			resolveProxyAttributes();
 		return super.nextToken();
 	}

 	private void resolveProxyAttributes() {
 		if (fNeedsLazyColorLoading && Display.getCurrent() != null) {
 			for (int i= 0; i < fPropertyNamesColor.length; i++) {
 				addToken(fPropertyNamesColor[i], fPropertyNamesBold[i], fPropertyNamesItalic[i], fPropertyNamesStrikethrough[i], fPropertyNamesUnderline[i]);
 			}
 			fNeedsLazyColorLoading= false;
 		}
 	}

 	private void addTokenWithProxyAttribute(String colorKey, String boldKey, String italicKey, String strikethroughKey, String underlineKey) {
 		fTokenMap.put(colorKey, new Token(createTextAttribute(null, boldKey, italicKey, strikethroughKey, underlineKey)));
 	}

 	private void addToken(String colorKey, String boldKey, String italicKey, String strikethroughKey, String underlineKey) {
 		if (fColorManager != null && colorKey != null && fColorManager.getColor(colorKey) == null) {
 			RGB rgb= PreferenceConverter.getColor(fPreferenceStore, colorKey);
 			if (fColorManager instanceof IColorManagerExtension) {
 				IColorManagerExtension ext= (IColorManagerExtension) fColorManager;
 				ext.unbindColor(colorKey);
 				ext.bindColor(colorKey, rgb);
 			}
 		}

 		if (!fNeedsLazyColorLoading)
 			fTokenMap.put(colorKey, new Token(createTextAttribute(colorKey, boldKey, italicKey, strikethroughKey, underlineKey)));
 		else {
 			Token token= ((Token)fTokenMap.get(colorKey));
 			if (token != null)
 				token.setData(createTextAttribute(colorKey, boldKey, italicKey, strikethroughKey, underlineKey));
 		}
 	}

 	/**
 	 * Create a text attribute based on the given color, bold, italic, strikethrough and underline preference keys.
 	 *
 	 * @param colorKey the color preference key
 	 * @param boldKey the bold preference key
 	 * @param italicKey the italic preference key
 	 * @param strikethroughKey the strikethrough preference key
 	 * @param underlineKey the italic preference key
 	 * @return the created text attribute
 	 * @since 3.0
 	 */
 	private TextAttribute createTextAttribute(String colorKey, String boldKey, String italicKey, String strikethroughKey, String underlineKey) {
 		Color color= null;
 		if (colorKey != null)
 			color= fColorManager.getColor(colorKey);

 		int style= fPreferenceStore.getBoolean(boldKey) ? SWT.BOLD : SWT.NORMAL;
 		if (fPreferenceStore.getBoolean(italicKey))
 			style |= SWT.ITALIC;

 		if (fPreferenceStore.getBoolean(strikethroughKey))
 			style |= TextAttribute.STRIKETHROUGH;

 		if (fPreferenceStore.getBoolean(underlineKey))
 			style |= TextAttribute.UNDERLINE;

 		return new TextAttribute(color, null, style);
 	}

 	protected Token getToken(String key) {
 		if (fNeedsLazyColorLoading)
 			resolveProxyAttributes();
 		return (Token) fTokenMap.get(key);
 	}

 	private void initializeRules() {
 		List rules= createRules();
 		if (rules != null) {
 			IRule[] result= new IRule[rules.size()];
 			rules.toArray(result);
 			setRules(result);
 		}
 	}

 	private int indexOf(String property) {
 		if (property != null) {
 			int length= fPropertyNamesColor.length;
 			for (int i= 0; i < length; i++) {
 				if (property.equals(fPropertyNamesColor[i]) || property.equals(fPropertyNamesBold[i]) || property.equals(fPropertyNamesItalic[i]) || property.equals(fPropertyNamesStrikethrough[i]) || property.equals(fPropertyNamesUnderline[i]))
 					return i;
 			}
 		}
 		return -1;
 	}

 	public boolean affectsBehavior(PropertyChangeEvent event) {
 		return indexOf(event.getProperty()) >= 0;
 	}

 	public void adaptToPreferenceChange(PropertyChangeEvent event) {
 		String p= event.getProperty();
 		int index= indexOf(p);
 		Token token= getToken(fPropertyNamesColor[index]);
 		if (fPropertyNamesColor[index].equals(p))
 			adaptToColorChange(token, event);
 		else if (fPropertyNamesBold[index].equals(p))
 			adaptToStyleChange(token, event, SWT.BOLD);
 		else if (fPropertyNamesItalic[index].equals(p))
 			adaptToStyleChange(token, event, SWT.ITALIC);
 		else if (fPropertyNamesStrikethrough[index].equals(p))
 			adaptToStyleChange(token, event, TextAttribute.STRIKETHROUGH);
 		else if (fPropertyNamesUnderline[index].equals(p))
 			adaptToStyleChange(token, event, TextAttribute.UNDERLINE);
 	}

 	private void adaptToColorChange(Token token, PropertyChangeEvent event) {
 		RGB rgb= null;

 		Object value= event.getNewValue();
 		if (value instanceof RGB)
 			rgb= (RGB) value;
 		else if (value instanceof String)
 			rgb= StringConverter.asRGB((String) value);

 		if (rgb != null) {

 			String property= event.getProperty();
 			Color color= fColorManager.getColor(property);

 			if ((color == null || !rgb.equals(color.getRGB())) && fColorManager instanceof IColorManagerExtension) {
 				IColorManagerExtension ext= (IColorManagerExtension) fColorManager;

 			 	ext.unbindColor(property);
 			 	ext.bindColor(property, rgb);

 				color= fColorManager.getColor(property);
 			}

 			Object data= token.getData();
 			if (data instanceof TextAttribute) {
 				TextAttribute oldAttr= (TextAttribute) data;
 				token.setData(new TextAttribute(color, oldAttr.getBackground(), oldAttr.getStyle()));
 			}
 		}
 	}

 	private void adaptToStyleChange(Token token, PropertyChangeEvent event, int styleAttribute) {
 		boolean eventValue= false;
 		Object value= event.getNewValue();
 		if (value instanceof Boolean)
 			eventValue= ((Boolean) value).booleanValue();
 		else if (IPreferenceStore.TRUE.equals(value))
 			eventValue= true;

 		Object data= token.getData();
 		if (data instanceof TextAttribute) {
 			TextAttribute oldAttr= (TextAttribute) data;
 			boolean activeValue= (oldAttr.getStyle() & styleAttribute) == styleAttribute;
 			if (activeValue != eventValue)
 				token.setData(new TextAttribute(oldAttr.getForeground(), oldAttr.getBackground(), eventValue ? oldAttr.getStyle() | styleAttribute : oldAttr.getStyle() & ~styleAttribute));
 		}
 	}
 	/**
 	 * Returns the preference store.
 	 *
 	 * @return the preference store.
 	 *
 	 * @since 3.0
 	 */
 	protected IPreferenceStore getPreferenceStore() {
 		return fPreferenceStore;
 	}
 }
	/*******************************************************************************
	* Copyright (c) 2000, 2005 IBM Corporation and others.
	* All rights reserved. This program and the accompanying materials
	* are made available under the terms of the Eclipse Public License v1.0
	* which accompanies this distribution, and is available at
	* http://www.eclipse.org/legal/epl-v10.html
	*
	* Contributors:
	* IBM Corporation - initial API and implementation
	*******************************************************************************/
	package org.eclipse.jdt.internal.ui.text;


	import java.util.HashMap;
	import java.util.List;
	import java.util.Map;

	import org.eclipse.swt.SWT;
	import org.eclipse.swt.graphics.Color;
	import org.eclipse.swt.graphics.RGB;
	import org.eclipse.swt.widgets.Display;

	import org.eclipse.jface.preference.IPreferenceStore;
	import org.eclipse.jface.preference.PreferenceConverter;
	import org.eclipse.jface.resource.StringConverter;
	import org.eclipse.jface.text.TextAttribute;
	import org.eclipse.jface.text.rules.BufferedRuleBasedScanner;
	import org.eclipse.jface.text.rules.IRule;
	import org.eclipse.jface.text.rules.IToken;
	import org.eclipse.jface.text.rules.Token;
	import org.eclipse.jface.util.PropertyChangeEvent;

	import org.eclipse.jdt.ui.PreferenceConstants;
	import org.eclipse.jdt.ui.text.IColorManager;
	import org.eclipse.jdt.ui.text.IColorManagerExtension;


	/**
	* Initialized with a color manager and a preference store, its subclasses are
	* only responsible for providing a list of preference keys for based on which tokens
	* are generated and to use this tokens to define the rules controlling this scanner.
	* <p>
	* This scanner stores the color defined by the color preference key into
	* the color manager under the same key.
	* </p>
	* <p>
	* Preference color key + {@link PreferenceConstants#EDITOR_BOLD_SUFFIX} are used
	* to retrieve whether the token is rendered in bold.
	* </p>
	* <p>
	* Preference color key + {@link PreferenceConstants#EDITOR_ITALIC_SUFFIX} are used
	* to retrieve whether the token is rendered in italic.
	* </p>
	* <p>
	* Preference color key + {@link PreferenceConstants#EDITOR_STRIKETHROUGH_SUFFIX} are used
	* to retrieve whether the token is rendered in strikethrough.
	* </p>
	* <p>
	* Preference color key + {@link PreferenceConstants#EDITOR_UNDERLINE_SUFFIX} are used
	* to retrieve whether the token is rendered in underline.
	* </p>
	*/
	public abstract class AbstractJavaScanner extends BufferedRuleBasedScanner {


	private IColorManager fColorManager;
	private IPreferenceStore fPreferenceStore;

	private Map fTokenMap= new HashMap();
	private String[] fPropertyNamesColor;
	/**
	* Preference keys for boolean preferences which are <code>true</code>,
	* iff the corresponding token should be rendered bold.
	*/
	private String[] fPropertyNamesBold;
	/**
	* Preference keys for boolean preferences which are <code>true</code>,
	* iff the corresponding token should be rendered italic.
	*
	* @since 3.0
	*/
	private String[] fPropertyNamesItalic;
	/**
	* Preference keys for boolean preferences which are <code>true</code>,
	* iff the corresponding token should be rendered strikethrough.
	*
	* @since 3.1
	*/
	private String[] fPropertyNamesStrikethrough;
	/**
	* Preference keys for boolean preferences which are <code>true</code>,
	* iff the corresponding token should be rendered underline.
	*
	* @since 3.1
	*/
	private String[] fPropertyNamesUnderline;


	private boolean fNeedsLazyColorLoading;

	/**
	* Returns an array of preference keys which define the tokens
	* used in the rules of this scanner.
	* <p>
	* The preference key is used access the color in the preference
	* store and in the color manager.
	* </p>
	* <p>
	* Preference key + {@link PreferenceConstants#EDITOR_BOLD_SUFFIX} is used
	* to retrieve whether the token is rendered in bold.
	* </p>
	* <p>
	* Preference key + {@link PreferenceConstants#EDITOR_ITALIC_SUFFIX} is used
	* to retrieve whether the token is rendered in italic.
	* </p>
	*/
	abstract protected String[] getTokenProperties();

	/**
	* Creates the list of rules controlling this scanner.
	*/
	abstract protected List createRules();


	/**
	* Creates an abstract Java scanner.
	*/
	public AbstractJavaScanner(IColorManager manager, IPreferenceStore store) {
	super();
	fColorManager= manager;
	fPreferenceStore= store;
	}

	/**
	* Must be called after the constructor has been called.
	*/
	public final void initialize() {

	fPropertyNamesColor= getTokenProperties();
	int length= fPropertyNamesColor.length;
	fPropertyNamesBold= new String[length];
	fPropertyNamesItalic= new String[length];
	fPropertyNamesStrikethrough= new String[length];
	fPropertyNamesUnderline= new String[length];

	fNeedsLazyColorLoading= Display.getCurrent() == null;

	for (int i= 0; i < length; i++) {
	fPropertyNamesBold[i]= fPropertyNamesColor[i] + PreferenceConstants.EDITOR_BOLD_SUFFIX;
	fPropertyNamesItalic[i]= fPropertyNamesColor[i] + PreferenceConstants.EDITOR_ITALIC_SUFFIX;
	fPropertyNamesStrikethrough[i]= fPropertyNamesColor[i] + PreferenceConstants.EDITOR_STRIKETHROUGH_SUFFIX;
	fPropertyNamesUnderline[i]= fPropertyNamesColor[i] + PreferenceConstants.EDITOR_UNDERLINE_SUFFIX;
	if (fNeedsLazyColorLoading)
	addTokenWithProxyAttribute(fPropertyNamesColor[i], fPropertyNamesBold[i], fPropertyNamesItalic[i], fPropertyNamesStrikethrough[i], fPropertyNamesUnderline[i]);
	else
	addToken(fPropertyNamesColor[i], fPropertyNamesBold[i], fPropertyNamesItalic[i], fPropertyNamesStrikethrough[i], fPropertyNamesUnderline[i]);
	}

	initializeRules();
	}

	public IToken nextToken() {
	if (fNeedsLazyColorLoading)
	resolveProxyAttributes();
	return super.nextToken();
	}

	private void resolveProxyAttributes() {
	if (fNeedsLazyColorLoading && Display.getCurrent() != null) {
	for (int i= 0; i < fPropertyNamesColor.length; i++) {
	addToken(fPropertyNamesColor[i], fPropertyNamesBold[i], fPropertyNamesItalic[i], fPropertyNamesStrikethrough[i], fPropertyNamesUnderline[i]);
	}
	fNeedsLazyColorLoading= false;
	}
	}

	private void addTokenWithProxyAttribute(String colorKey, String boldKey, String italicKey, String strikethroughKey, String underlineKey) {
	fTokenMap.put(colorKey, new Token(createTextAttribute(null, boldKey, italicKey, strikethroughKey, underlineKey)));
	}

	private void addToken(String colorKey, String boldKey, String italicKey, String strikethroughKey, String underlineKey) {
	if (fColorManager != null && colorKey != null && fColorManager.getColor(colorKey) == null) {
	RGB rgb= PreferenceConverter.getColor(fPreferenceStore, colorKey);
	if (fColorManager instanceof IColorManagerExtension) {
	IColorManagerExtension ext= (IColorManagerExtension) fColorManager;
	ext.unbindColor(colorKey);
	ext.bindColor(colorKey, rgb);
	}
	}

	if (!fNeedsLazyColorLoading)
	fTokenMap.put(colorKey, new Token(createTextAttribute(colorKey, boldKey, italicKey, strikethroughKey, underlineKey)));
	else {
	Token token= ((Token)fTokenMap.get(colorKey));
	if (token != null)
	token.setData(createTextAttribute(colorKey, boldKey, italicKey, strikethroughKey, underlineKey));
	}
	}

	/**
	* Create a text attribute based on the given color, bold, italic, strikethrough and underline preference keys.
	*
	* @param colorKey the color preference key
	* @param boldKey the bold preference key
	* @param italicKey the italic preference key
	* @param strikethroughKey the strikethrough preference key
	* @param underlineKey the italic preference key
	* @return the created text attribute
	* @since 3.0
	*/
	private TextAttribute createTextAttribute(String colorKey, String boldKey, String italicKey, String strikethroughKey, String underlineKey) {
	Color color= null;
	if (colorKey != null)
	color= fColorManager.getColor(colorKey);

	int style= fPreferenceStore.getBoolean(boldKey) ? SWT.BOLD : SWT.NORMAL;
	if (fPreferenceStore.getBoolean(italicKey))
	style \|= SWT.ITALIC;

	if (fPreferenceStore.getBoolean(strikethroughKey))
	style \|= TextAttribute.STRIKETHROUGH;

	if (fPreferenceStore.getBoolean(underlineKey))
	style \|= TextAttribute.UNDERLINE;

	return new TextAttribute(color, null, style);
	}

	protected Token getToken(String key) {
	if (fNeedsLazyColorLoading)
	resolveProxyAttributes();
	return (Token) fTokenMap.get(key);
	}

	private void initializeRules() {
	List rules= createRules();
	if (rules != null) {
	IRule[] result= new IRule[rules.size()];
	rules.toArray(result);
	setRules(result);
	}
	}

	private int indexOf(String property) {
	if (property != null) {
	int length= fPropertyNamesColor.length;
	for (int i= 0; i < length; i++) {
	if (property.equals(fPropertyNamesColor[i]) \|\| property.equals(fPropertyNamesBold[i]) \|\| property.equals(fPropertyNamesItalic[i]) \|\| property.equals(fPropertyNamesStrikethrough[i]) \|\| property.equals(fPropertyNamesUnderline[i]))
	return i;
	}
	}
	return -1;
	}

	public boolean affectsBehavior(PropertyChangeEvent event) {
	return indexOf(event.getProperty()) >= 0;
	}

	public void adaptToPreferenceChange(PropertyChangeEvent event) {
	String p= event.getProperty();
	int index= indexOf(p);
	Token token= getToken(fPropertyNamesColor[index]);
	if (fPropertyNamesColor[index].equals(p))
	adaptToColorChange(token, event);
	else if (fPropertyNamesBold[index].equals(p))
	adaptToStyleChange(token, event, SWT.BOLD);
	else if (fPropertyNamesItalic[index].equals(p))
	adaptToStyleChange(token, event, SWT.ITALIC);
	else if (fPropertyNamesStrikethrough[index].equals(p))
	adaptToStyleChange(token, event, TextAttribute.STRIKETHROUGH);
	else if (fPropertyNamesUnderline[index].equals(p))
	adaptToStyleChange(token, event, TextAttribute.UNDERLINE);
	}

	private void adaptToColorChange(Token token, PropertyChangeEvent event) {
	RGB rgb= null;

	Object value= event.getNewValue();
	if (value instanceof RGB)
	rgb= (RGB) value;
	else if (value instanceof String)
	rgb= StringConverter.asRGB((String) value);

	if (rgb != null) {

	String property= event.getProperty();
	Color color= fColorManager.getColor(property);

	if ((color == null \|\| !rgb.equals(color.getRGB())) && fColorManager instanceof IColorManagerExtension) {
	IColorManagerExtension ext= (IColorManagerExtension) fColorManager;

	ext.unbindColor(property);
	ext.bindColor(property, rgb);

	color= fColorManager.getColor(property);
	}

	Object data= token.getData();
	if (data instanceof TextAttribute) {
	TextAttribute oldAttr= (TextAttribute) data;
	token.setData(new TextAttribute(color, oldAttr.getBackground(), oldAttr.getStyle()));
	}
	}
	}

	private void adaptToStyleChange(Token token, PropertyChangeEvent event, int styleAttribute) {
	boolean eventValue= false;
	Object value= event.getNewValue();
	if (value instanceof Boolean)
	eventValue= ((Boolean) value).booleanValue();
	else if (IPreferenceStore.TRUE.equals(value))
	eventValue= true;

	Object data= token.getData();
	if (data instanceof TextAttribute) {
	TextAttribute oldAttr= (TextAttribute) data;
	boolean activeValue= (oldAttr.getStyle() & styleAttribute) == styleAttribute;
	if (activeValue != eventValue)
	token.setData(new TextAttribute(oldAttr.getForeground(), oldAttr.getBackground(), eventValue ? oldAttr.getStyle() \| styleAttribute : oldAttr.getStyle() & ~styleAttribute));
	}
	}
	/**
	* Returns the preference store.
	*
	* @return the preference store.
	*
	* @since 3.0
	*/
	protected IPreferenceStore getPreferenceStore() {
	return fPreferenceStore;
	}
	}