debughtmleditorkit.java

java swing 开发代码

// DebugHTMLEditorKit.java
// A simple extension of the HTMLEditor kit that uses a verbose ViewFactory.
//
package	jswing.ch23;

import javax.swing.*;
import javax.swing.text.*;
import javax.swing.text.html.*;

public class DebugHTMLEditorKit extends HTMLEditorKit {
  public static HTML.Tag ORA = new HTML.UnknownTag("ora");
  public static AttributeSet currentAnchor;

  public void install(JEditorPane paneEditor) {
    super.install(paneEditor);
    StyleSheet ss = getStyleSheet();
    java.util.Enumeration e = ss.getStyleNames();
    while (e.hasMoreElements()) {
      System.out.println(e.nextElement());
    }
  }

  public ViewFactory getViewFactory() {
    return new VerboseViewFactory();
  }

  public static class VerboseViewFactory extends HTMLEditorKit.HTMLFactory
  {
    public View create(Element elem) {
      System.out.print("Element: " + elem.getName());
      Object o=elem.getAttributes().
        getAttribute(StyleConstants.NameAttribute);
      HTML.Tag kind = (HTML.Tag) o;
      System.out.println(" view as: " + o);
      dumpElementAttributes(elem);
      return super.create(elem);
    }

    private void dumpElementAttributes(Element elem) {
      AttributeSet attrs = elem.getAttributes();
      java.util.Enumeration names = attrs.getAttributeNames();
      while (names.hasMoreElements()) {
        Object key = names.nextElement();
        System.out.println("  " + key + " : " + attrs.getAttribute(key));
      }
      try {
        System.out.println("  " + 
          elem.getDocument().getText(elem.getStartOffset(), 
            elem.getEndOffset()));
      } catch (Exception e) { // We don't deal with null elements for now.
      }
    }
  }
}