/*
* Copyright 2006-2008 Kees de Kooter
*
* 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 net.boplicity.xmleditor;
import java.awt.Color;
import java.awt.Graphics;
import java.util.HashMap;
import java.util.LinkedHashMap;
import java.util.Map;
import java.util.SortedMap;
import java.util.TreeMap;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import javax.swing.text.BadLocationException;
import javax.swing.text.Document;
import javax.swing.text.Element;
import javax.swing.text.PlainDocument;
import javax.swing.text.PlainView;
import javax.swing.text.Segment;
import javax.swing.text.Utilities;
/**
* Thanks: http://groups.google.com/group/de.comp.lang.java/msg/2bbeb016abad270
*
* IMPORTANT NOTE: regex should contain 1 group.
*
* Using PlainView here because we don't want line wrapping to occur.
*
* @author kees
* @date 13-jan-2006
*
*/
public class XmlView extends PlainView {
private static HashMap<Pattern, Color> patternColors;
private static String GENERIC_XML_NAME = "[A-Za-z]+[A-Za-z0-9\\-_]*(:[A-Za-z]+[A-Za-z0-9\\-_]+)?";
private static String TAG_PATTERN = "(</?" + GENERIC_XML_NAME + ")";
private static String TAG_END_PATTERN = "(>|/>)";
private static String TAG_ATTRIBUTE_PATTERN = "(" + GENERIC_XML_NAME + ")\\w*\\=";
private static String TAG_ATTRIBUTE_VALUE = "\\w*\\=\\w*(\"[^\"]*\")";
private static String TAG_COMMENT = "(<\\!--[\\w ]*-->)";
private static String TAG_CDATA = "(<\\!\\[CDATA\\[.*\\]\\]>)";
static {
// NOTE: the order is important!
patternColors = new LinkedHashMap<Pattern, Color>();
patternColors
.put(Pattern.compile(TAG_PATTERN), new Color(63, 127, 127));
patternColors.put(Pattern.compile(TAG_CDATA), Color.GRAY);
patternColors.put(Pattern.compile(TAG_ATTRIBUTE_PATTERN), new Color(
127, 0, 127));
patternColors.put(Pattern.compile(TAG_END_PATTERN), new Color(63, 127,
127));
patternColors.put(Pattern.compile(TAG_ATTRIBUTE_VALUE), new Color(42,
0, 255));
patternColors.put(Pattern.compile(TAG_COMMENT), Color.BLUE);
}
public XmlView(Element element) {
super(element);
// Set tabsize to 4 (instead of the default 8)
getDocument().putProperty(PlainDocument.tabSizeAttribute, 4);
}
@Override
protected int drawUnselectedText(Graphics graphics, int x, int y, int p0,
int p1) throws BadLocationException {
Document doc = getDocument();
String text = doc.getText(p0, p1 - p0);
Segment segment = getLineBuffer();
SortedMap<Integer, Integer> startMap = new TreeMap<Integer, Integer>();
SortedMap<Integer, Color> colorMap = new TreeMap<Integer, Color>();
// Match all regexes on this snippet, store positions
for (Map.Entry<Pattern, Color> entry : patternColors.entrySet()) {
Matcher matcher = entry.getKey().matcher(text);
while (matcher.find()) {
startMap.put(matcher.start(1), matcher.end());
colorMap.put(matcher.start(1), entry.getValue());
}
}
// TODO: check the map for overlapping parts
int i = 0;
// Colour the parts
for (Map.Entry<Integer, Integer> entry : startMap.entrySet()) {
int start = entry.getKey();
int end = entry.getValue();
if (i < start) {
graphics.setColor(Color.black);
doc.getText(p0 + i, start - i, segment);
x = Utilities.drawTabbedText(segment, x, y, graphics, this, i);
}
graphics.setColor(colorMap.get(start));
i = end;
doc.getText(p0 + start, i - start, segment);
x = Utilities.drawTabbedText(segment, x, y, graphics, this, start);
}
// Paint possible remaining text black
if (i < text.length()) {
graphics.setColor(Color.black);
doc.getText(p0 + i, text.length() - i, segment);
x = Utilities.drawTabbedText(segment, x, y, graphics, this, i);
}
return x;
}
}