--- /dev/null
+package net.sourceforge.phpdt.internal.ui.text;
+
+/*
+ * (c) Copyright IBM Corp. 2000, 2001.
+ * All Rights Reserved.
+ */
+
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+import net.sourceforge.phpdt.ui.text.IColorManager;
+import net.sourceforge.phpdt.ui.text.IColorManagerExtension;
+
+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.Token;
+import org.eclipse.jface.util.PropertyChangeEvent;
+import org.eclipse.swt.SWT;
+import org.eclipse.swt.graphics.RGB;
+
+/**
+ * Initialized with a color manager and a preference store, its subclasses are
+ * only responsible for providing a list of preference keys based on which
+ * tokens are generated and to use this tokens to define the rules controlling
+ * this scanner.
+ */
+public abstract class AbstractJavaScanner extends BufferedRuleBasedScanner {
+
+ private IColorManager fColorManager;
+
+ private IPreferenceStore fPreferenceStore;
+
+ private Map fTokenMap = new HashMap();
+
+ private String[] fPropertyNamesColor;
+
+ private String[] fPropertyNamesStyle;
+
+ /**
+ * Returns the list of preference keys which define the tokens used in the
+ * rules of this scanner.
+ */
+ 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;
+ fPropertyNamesStyle = new String[length];
+ for (int i = 0; i < length; i++) {
+ fPropertyNamesStyle[i] = fPropertyNamesColor[i] + "_bold"; //$NON-NLS-1$
+ addToken(fPropertyNamesColor[i], fPropertyNamesStyle[i]);
+ }
+
+ initializeRules();
+ }
+
+ private void addToken(String colorKey, String styleKey) {
+ RGB rgb = PreferenceConverter.getColor(fPreferenceStore, colorKey);
+ if (fColorManager instanceof IColorManagerExtension) {
+ IColorManagerExtension ext = (IColorManagerExtension) fColorManager;
+ ext.unbindColor(colorKey);
+ ext.bindColor(colorKey, rgb);
+ }
+
+ boolean bold = fPreferenceStore.getBoolean(styleKey);
+ fTokenMap.put(colorKey, new Token(new TextAttribute(fColorManager
+ .getColor(colorKey), null, bold ? SWT.BOLD : SWT.NORMAL)));
+ }
+
+ protected Token getToken(String key) {
+ 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(fPropertyNamesStyle[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
+ adaptToStyleChange(token, event);
+ }
+
+ 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();
+
+ if (fColorManager instanceof IColorManagerExtension) {
+ IColorManagerExtension ext = (IColorManagerExtension) fColorManager;
+ ext.unbindColor(property);
+ ext.bindColor(property, rgb);
+ }
+
+ Object data = token.getData();
+ if (data instanceof TextAttribute) {
+ TextAttribute oldAttr = (TextAttribute) data;
+ token.setData(new TextAttribute(fColorManager
+ .getColor(property), oldAttr.getBackground(), oldAttr
+ .getStyle()));
+ }
+ }
+ }
+
+ private void adaptToStyleChange(Token token, PropertyChangeEvent event) {
+ boolean bold = false;
+ Object value = event.getNewValue();
+ if (value instanceof Boolean)
+ bold = ((Boolean) value).booleanValue();
+ else if (value instanceof String) {
+ String s = (String) value;
+ if (IPreferenceStore.TRUE.equals(s))
+ bold = true;
+ else if (IPreferenceStore.FALSE.equals(s))
+ bold = false;
+ }
+
+ Object data = token.getData();
+ if (data instanceof TextAttribute) {
+ TextAttribute oldAttr = (TextAttribute) data;
+ boolean isBold = (oldAttr.getStyle() == SWT.BOLD);
+ if (isBold != bold)
+ token.setData(new TextAttribute(oldAttr.getForeground(),
+ oldAttr.getBackground(), bold ? SWT.BOLD : SWT.NORMAL));
+ }
+ }
+}
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