package net.sourceforge.sqlexplorer.sqleditor;
/*
* Copyright (C) 2002-2004 Andrea Mazzolini
* andreamazzolini@users.sourceforge.net
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
import java.util.HashMap;
import java.util.List;
import java.util.Map;
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;
public abstract class AbstractSQLScanner 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 AbstractSQLScanner(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) {
//System.out.println("AddToken "+colorKey+" "+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));
}
}
}