core/plugins/org.eclipse.dltk.ui/src/org/eclipse/dltk/ui/text/AbstractScriptScanner.java - dltk/org.eclipse.dltk.core - Git at Google

 /*******************************************************************************
  * Copyright (c) 2000, 2017 IBM Corporation and others.
  * This program and the accompanying materials are made available under the
  * terms of the Eclipse Public License v. 2.0 which is available at
  * http://www.eclipse.org/legal/epl-2.0.
  *
  * SPDX-License-Identifier: EPL-2.0
  *
  *******************************************************************************/
 package org.eclipse.dltk.ui.text;

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

 import org.eclipse.core.runtime.Assert;
 import org.eclipse.dltk.ui.ColorPreferenceConverter;
 import org.eclipse.dltk.ui.PreferenceConstants;
 import org.eclipse.jface.preference.IPreferenceStore;
 import org.eclipse.jface.preference.PreferenceConverter;
 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.swt.SWT;
 import org.eclipse.swt.graphics.Color;
 import org.eclipse.swt.graphics.RGB;
 import org.eclipse.swt.widgets.Display;

 /**
  * 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 AbstractScriptScanner extends BufferedRuleBasedScanner
 		implements ITokenFactory {

 	private IColorManager fColorManager;
 	private IPreferenceStore fPreferenceStore;

 	private Map<String, Token> 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.
 	 *
 	 *
 	 */
 	private String[] fPropertyNamesItalic;
 	/**
 	 * Preference keys for boolean preferences which are <code>true</code>, iff
 	 * the corresponding token should be rendered strikethrough.
 	 *
 	 *
 	 */
 	private String[] fPropertyNamesStrikethrough;
 	/**
 	 * Preference keys for boolean preferences which are <code>true</code>, iff
 	 * the corresponding token should be rendered underline.
 	 *
 	 *
 	 */
 	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>
 	 * <p>
 	 * Preference key + {@link PreferenceConstants#EDITOR_UNDERLINE_SUFFIX} is
 	 * used to retrieve whether the token is rendered underlined.
 	 * </p>
 	 * <p>
 	 * Preference key + {@link PreferenceConstants#EDITOR_STRIKETHROUGH_SUFFIX}
 	 * is used to retrieve whether the token is rendered stricken out.
 	 * </p>
 	 */
 	abstract protected String[] getTokenProperties();

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

 	/**
 	 * Creates an abstract script scanner.
 	 */
 	public AbstractScriptScanner(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];

 		for (int i = 0; i < length; i++) {
 			fPropertyNamesBold[i] = getBoldKey(fPropertyNamesColor[i]);
 			fPropertyNamesItalic[i] = getItalicKey(fPropertyNamesColor[i]);
 			fPropertyNamesStrikethrough[i] = getStrikethroughKey(
 					fPropertyNamesColor[i]);
 			fPropertyNamesUnderline[i] = getUnderlineKey(
 					fPropertyNamesColor[i]);
 		}

 		fNeedsLazyColorLoading = Display.getCurrent() == null;
 		for (int i = 0; i < length; i++) {
 			createToken(i);
 		}

 		initializeRules();
 	}

 	protected void createToken(int index) {
 		if (fNeedsLazyColorLoading)
 			addTokenWithProxyAttribute(fPropertyNamesColor[index],
 					fPropertyNamesBold[index], fPropertyNamesItalic[index],
 					fPropertyNamesStrikethrough[index],
 					fPropertyNamesUnderline[index]);
 		else
 			addToken(fPropertyNamesColor[index], fPropertyNamesBold[index],
 					fPropertyNamesItalic[index],
 					fPropertyNamesStrikethrough[index],
 					fPropertyNamesUnderline[index]);
 	}

 	protected String getBoldKey(String colorKey) {
 		return colorKey + PreferenceConstants.EDITOR_BOLD_SUFFIX;
 	}

 	protected String getItalicKey(String colorKey) {
 		return colorKey + PreferenceConstants.EDITOR_ITALIC_SUFFIX;
 	}

 	protected String getStrikethroughKey(String colorKey) {
 		return colorKey + PreferenceConstants.EDITOR_STRIKETHROUGH_SUFFIX;
 	}

 	protected String getUnderlineKey(String colorKey) {
 		return colorKey + PreferenceConstants.EDITOR_UNDERLINE_SUFFIX;
 	}

 	@Override
 	public IToken nextToken() {
 		doResolveProxyAttributes();
 		return super.nextToken();
 	}

 	/**
 	 * @since 3.0
 	 */
 	protected final void doResolveProxyAttributes() {
 		if (fNeedsLazyColorLoading)
 			resolveProxyAttributes();
 	}

 	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) {
 			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 = 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
 	 *
 	 */
 	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);
 	}

 	@Override
 	public Token getToken(String key) {
 		doResolveProxyAttributes();
 		Token token = fTokenMap.get(key);
 		if (token == null) {
 			final int index = fPropertyNamesColor.length;
 			fPropertyNamesColor = resize(fPropertyNamesColor, index, key);
 			fPropertyNamesBold = resize(fPropertyNamesBold, index,
 					getBoldKey(key));
 			fPropertyNamesItalic = resize(fPropertyNamesItalic, index,
 					getItalicKey(key));
 			fPropertyNamesStrikethrough = resize(fPropertyNamesStrikethrough,
 					index, getStrikethroughKey(key));
 			fPropertyNamesUnderline = resize(fPropertyNamesUnderline, index,
 					getUnderlineKey(key));
 			createToken(index);
 			token = fTokenMap.get(key);
 			Assert.isNotNull(token);
 		}
 		return token;
 	}

 	private static String[] resize(String[] old, int index, String value) {
 		final String[] result = new String[index + 1];
 		System.arraycopy(old, 0, result, 0, old.length);
 		result[index] = value;
 		return result;
 	}

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

 	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);
 		if (index < 0)
 			return;
 		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 = ColorPreferenceConverter.asRGB(event.getNewValue());
 		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.
 	 *
 	 *
 	 */
 	protected IPreferenceStore getPreferenceStore() {
 		return fPreferenceStore;
 	}
 }
	/*******************************************************************************
	* Copyright (c) 2000, 2017 IBM Corporation and others.
	* This program and the accompanying materials are made available under the
	* terms of the Eclipse Public License v. 2.0 which is available at
	* http://www.eclipse.org/legal/epl-2.0.
	*
	* SPDX-License-Identifier: EPL-2.0
	*
	*******************************************************************************/
	package org.eclipse.dltk.ui.text;

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

	import org.eclipse.core.runtime.Assert;
	import org.eclipse.dltk.ui.ColorPreferenceConverter;
	import org.eclipse.dltk.ui.PreferenceConstants;
	import org.eclipse.jface.preference.IPreferenceStore;
	import org.eclipse.jface.preference.PreferenceConverter;
	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.swt.SWT;
	import org.eclipse.swt.graphics.Color;
	import org.eclipse.swt.graphics.RGB;
	import org.eclipse.swt.widgets.Display;

	/**
	* 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 AbstractScriptScanner extends BufferedRuleBasedScanner
	implements ITokenFactory {

	private IColorManager fColorManager;
	private IPreferenceStore fPreferenceStore;

	private Map<String, Token> 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.
	*
	*
	*/
	private String[] fPropertyNamesItalic;
	/**
	* Preference keys for boolean preferences which are <code>true</code>, iff
	* the corresponding token should be rendered strikethrough.
	*
	*
	*/
	private String[] fPropertyNamesStrikethrough;
	/**
	* Preference keys for boolean preferences which are <code>true</code>, iff
	* the corresponding token should be rendered underline.
	*
	*
	*/
	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>
	* <p>
	* Preference key + {@link PreferenceConstants#EDITOR_UNDERLINE_SUFFIX} is
	* used to retrieve whether the token is rendered underlined.
	* </p>
	* <p>
	* Preference key + {@link PreferenceConstants#EDITOR_STRIKETHROUGH_SUFFIX}
	* is used to retrieve whether the token is rendered stricken out.
	* </p>
	*/
	abstract protected String[] getTokenProperties();

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

	/**
	* Creates an abstract script scanner.
	*/
	public AbstractScriptScanner(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];

	for (int i = 0; i < length; i++) {
	fPropertyNamesBold[i] = getBoldKey(fPropertyNamesColor[i]);
	fPropertyNamesItalic[i] = getItalicKey(fPropertyNamesColor[i]);
	fPropertyNamesStrikethrough[i] = getStrikethroughKey(
	fPropertyNamesColor[i]);
	fPropertyNamesUnderline[i] = getUnderlineKey(
	fPropertyNamesColor[i]);
	}

	fNeedsLazyColorLoading = Display.getCurrent() == null;
	for (int i = 0; i < length; i++) {
	createToken(i);
	}

	initializeRules();
	}

	protected void createToken(int index) {
	if (fNeedsLazyColorLoading)
	addTokenWithProxyAttribute(fPropertyNamesColor[index],
	fPropertyNamesBold[index], fPropertyNamesItalic[index],
	fPropertyNamesStrikethrough[index],
	fPropertyNamesUnderline[index]);
	else
	addToken(fPropertyNamesColor[index], fPropertyNamesBold[index],
	fPropertyNamesItalic[index],
	fPropertyNamesStrikethrough[index],
	fPropertyNamesUnderline[index]);
	}

	protected String getBoldKey(String colorKey) {
	return colorKey + PreferenceConstants.EDITOR_BOLD_SUFFIX;
	}

	protected String getItalicKey(String colorKey) {
	return colorKey + PreferenceConstants.EDITOR_ITALIC_SUFFIX;
	}

	protected String getStrikethroughKey(String colorKey) {
	return colorKey + PreferenceConstants.EDITOR_STRIKETHROUGH_SUFFIX;
	}

	protected String getUnderlineKey(String colorKey) {
	return colorKey + PreferenceConstants.EDITOR_UNDERLINE_SUFFIX;
	}

	@Override
	public IToken nextToken() {
	doResolveProxyAttributes();
	return super.nextToken();
	}

	/**
	* @since 3.0
	*/
	protected final void doResolveProxyAttributes() {
	if (fNeedsLazyColorLoading)
	resolveProxyAttributes();
	}

	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) {
	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 = 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
	*
	*/
	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);
	}

	@Override
	public Token getToken(String key) {
	doResolveProxyAttributes();
	Token token = fTokenMap.get(key);
	if (token == null) {
	final int index = fPropertyNamesColor.length;
	fPropertyNamesColor = resize(fPropertyNamesColor, index, key);
	fPropertyNamesBold = resize(fPropertyNamesBold, index,
	getBoldKey(key));
	fPropertyNamesItalic = resize(fPropertyNamesItalic, index,
	getItalicKey(key));
	fPropertyNamesStrikethrough = resize(fPropertyNamesStrikethrough,
	index, getStrikethroughKey(key));
	fPropertyNamesUnderline = resize(fPropertyNamesUnderline, index,
	getUnderlineKey(key));
	createToken(index);
	token = fTokenMap.get(key);
	Assert.isNotNull(token);
	}
	return token;
	}

	private static String[] resize(String[] old, int index, String value) {
	final String[] result = new String[index + 1];
	System.arraycopy(old, 0, result, 0, old.length);
	result[index] = value;
	return result;
	}

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

	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);
	if (index < 0)
	return;
	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 = ColorPreferenceConverter.asRGB(event.getNewValue());
	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.
	*
	*
	*/
	protected IPreferenceStore getPreferenceStore() {
	return fPreferenceStore;
	}
	}