JEditorPane Replace Reader
/*
Core SWING Advanced Programming
By Kim Topley
ISBN: 0 13 083292 8
Publisher: Prentice Hall
*/
import java.io.FileReader;
import javax.swing.JEditorPane;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.UIManager;
import javax.swing.text.BadLocationException;
import javax.swing.text.Document;
import javax.swing.text.MutableAttributeSet;
import javax.swing.text.html.HTML;
import javax.swing.text.html.HTMLDocument;
import javax.swing.text.html.HTMLEditorKit;
import javax.swing.text.html.StyleSheet;
public class ReplaceReader {
public static void main(String[] args) {
try {
UIManager.setLookAndFeel("com.sun.java.swing.plaf.windows.WindowsLookAndFeel");
} catch (Exception evt) {}
JFrame f = new JFrame("JEditorPane with Custom Reader");
JEditorPane ep = new JEditorPane();
f.getContentPane().add(new JScrollPane(ep));
f.setSize(400, 300);
f.setVisible(true);
HTMLEditorKit kit = new HTMLEditorKit() {
public Document createDefaultDocument() {
HTMLDocument doc = new CustomHTMLDocument(getStyleSheet());
doc.setAsynchronousLoadPriority(4);
doc.setTokenThreshold(100);
return doc;
}
};
ep.setEditorKit(kit);
try {
Document doc = ep.getDocument();
doc.putProperty("IgnoreCharsetDirective", new Boolean(true));
kit.read(new FileReader(args[0]), doc, 0);
} catch (Exception e) {
System.out.println("Exception while reading HTML " + e);
}
}
}
class CustomHTMLDocument extends HTMLDocument {
CustomHTMLDocument(StyleSheet styles) {
super(styles);
}
public HTMLEditorKit.ParserCallback getReader(int pos) {
return new CustomReader(pos);
}
class CustomReader extends HTMLDocument.HTMLReader {
public CustomReader(int pos) {
super(pos);
}
public void flush() throws BadLocationException {
System.out.println("flush called");
super.flush();
}
public void handleText(char[] data, int pos) {
indent();
System.out.println("handleText <" + new String(data) + ">, pos " + pos);
super.handleText(data, pos);
}
public void handleComment(char[] data, int pos) {
indent();
System.out.println("handleComment <" + new String(data) + ">, pos " + pos);
super.handleComment(data, pos);
}
public void handleStartTag(HTML.Tag t, MutableAttributeSet a, int pos) {
indent();
System.out.println("handleStartTag <" + t + ">, pos " + pos);
indent();
System.out.println("Attributes: " + a);
tagLevel++;
super.handleStartTag(t, a, pos);
}
public void handleEndTag(HTML.Tag t, int pos) {
tagLevel--;
indent();
System.out.println("handleEndTag <" + t + ">, pos " + pos);
super.handleEndTag(t, pos);
}
public void handleSimpleTag(HTML.Tag t, MutableAttributeSet a, int pos) {
indent();
System.out.println("handleSimpleTag <" + t + ">, pos " + pos);
indent();
System.out.println("Attributes: " + a);
super.handleSimpleTag(t, a, pos);
}
public void handleError(String errorMsg, int pos){
indent();
System.out.println("handleError <" + errorMsg + ">, pos " + pos);
super.handleError(errorMsg, pos);
}
protected void indent() {
for (int i = 0; i < tagLevel; i++) {
System.out.print(" ");
}
}
int tagLevel;
}
}
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