/*
* Copyright 2008 Ayman Al-Sairafi ayman.alsairafi@gmail.com
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License
* at http://www.apache.org/licenses/LICENSE-2.0
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package jsyntaxpane.components;
import jsyntaxpane.actions.*;
import java.awt.Color;
import java.util.HashSet;
import java.util.Iterator;
import java.util.Set;
import java.util.logging.Logger;
import javax.swing.JEditorPane;
import javax.swing.event.CaretEvent;
import javax.swing.event.CaretListener;
import jsyntaxpane.SyntaxDocument;
import jsyntaxpane.Token;
import jsyntaxpane.TokenType;
import jsyntaxpane.util.Configuration;
/**
* This class highlights Tokens within a document whenever the caret is moved
* to a TokenType provided in the config file.
*
* @author Ayman Al-Sairafi
*/
public class TokenMarker implements SyntaxComponent, CaretListener {
public static final String DEFAULT_TOKENTYPES = "IDENTIFIER, TYPE, TYPE2, TYPE3";
public static final String PROPERTY_COLOR = "TokenMarker.Color";
public static final String PROPERTY_TOKENTYPES = "TokenMarker.TokenTypes";
private static final int DEFAULT_COLOR = 16772710;
private JEditorPane pane;
private Set<TokenType> tokenTypes = new HashSet<TokenType>();
private Markers.SimpleMarker marker;
/**
* Constructs a new Token highlighter
*/
public TokenMarker() {
}
@Override
public void caretUpdate(CaretEvent e) {
int pos = e.getDot();
SyntaxDocument doc = ActionUtils.getSyntaxDocument(pane);
Token token = doc.getTokenAt(pos);
removeMarkers();
if (token != null && tokenTypes.contains(token.type)) {
addMarkers(token);
}
}
/**
* removes all markers from the pane.
*/
public void removeMarkers() {
Markers.removeMarkers(pane, marker);
}
/**
* add highlights for the given pattern
* @param pattern
*/
void addMarkers(Token tok) {
SyntaxDocument sDoc = (SyntaxDocument) pane.getDocument();
sDoc.readLock();
String text = tok.getText(sDoc).toLowerCase();
Iterator<Token> it = sDoc.getTokens(0, sDoc.getLength());
while (it.hasNext()) {
Token nextToken = it.next();
if (nextToken.length == tok.length && text.equals(nextToken.getText(sDoc).toLowerCase())) {
Markers.markToken(pane, nextToken, marker);
}
}
sDoc.readUnlock();
}
@Override
public void config(Configuration config, String prefix) {
Color markerColor = new Color(config.getPrefixInteger(prefix,
PROPERTY_COLOR, DEFAULT_COLOR));
this.marker = new Markers.SimpleMarker(markerColor);
String types = config.getPrefixProperty(prefix,
PROPERTY_TOKENTYPES, DEFAULT_TOKENTYPES);
for (String type : types.split("\\s*,\\s*")) {
try {
TokenType tt = TokenType.valueOf(type);
tokenTypes.add(tt);
} catch (IllegalArgumentException e) {
LOG.warning("Error in setting up TokenMarker for " + prefix +
" - Invalid TokenType: " + type);
}
}
}
@Override
public void install(JEditorPane editor) {
this.pane = editor;
pane.addCaretListener(this);
}
@Override
public void deinstall(JEditorPane editor) {
removeMarkers();
pane.removeCaretListener(this);
}
private static final Logger LOG = Logger.getLogger(TokenMarker.class.getName());
}