Name: dbT83986 Date: 04/09/99


I'm using Swing1.1.1beta2 with JDK1.1.7b. The problems occur
when you insert <BR>, or <BR> is in the HTML doc. when it is
loaded. Right after that inserting any text would cause it to
to be displayed in the previous line, right after you typed a
word and press a space. Here's what I've done:

import javax.swing.*;
import javax.swing.border.*;
import javax.swing.text.*;
import javax.swing.text.html.*;
import javax.swing.event.*;
import java.awt.event.*;
import java.awt.*;
import java.net.*;
import java.io.*;
import java.util.*;

class SimplyHTML extends JFrame implements ActionListener{

    JEditorPane ep;
    HTMLDocument doc;
    HTMLEditorKit kit = new HTMLEditorKit();
    StyleSheet css;
    boolean printCSS = false;

    protected final int BOLD_ACTION = 0;
    protected final int ITALIC_ACTION = 1;
    protected final int UNDERLINE_ACTION = 2;
    protected final int LINK_ACTION = 3;
    protected final int OUTPUT_ACTION = 4;

    SimplyHTML() {
        JPanel p = new JPanel();
        ep = new JEditorPane();
        ep.setContentType("text/html");
        ep.setEditable(true);
        ep.setEditorKit(kit);
        ep.setText("<P><B>Bold String</B><BR><U>Underline String</U></P>");

        JButton b = new JButton("Output");
        b.addActionListener(this);
        b.setRequestFocusEnabled(false);
        p.add(b);

        doc = ep.getDocument();

        b = new JButton("Break");
        b.addActionListener(new BreakAction("break"));
        b.setRequestFocusEnabled(false);
        p.add(b);
        b = new JButton("Bold");
        b.addActionListener(new BoldAction("bold"));
        b.setRequestFocusEnabled(false);
        p.add(b);
        b = new JButton("Italic");
        b.addActionListener(new ItalicAction("italic"));
        b.setRequestFocusEnabled(false);
        p.add(b);
        b = new JButton("Underline");
        b.addActionListener(new UnderlineAction("underline"));
        b.setRequestFocusEnabled(false);
        p.add(b);
        b = new JButton("Link");
        b.addActionListener(new LinkAction("link"));
        b.setRequestFocusEnabled(false);
        p.add(b);
        getContentPane().add(new JScrollPane(ep), "Center");
        getContentPane().add(p, "South");

    }

    public void actionPerformed(ActionEvent e) {
        System.out.println(ModelDisplay.showModel(ep.getDocument()));
        System.out.println(ep.getText());
        if (printCSS) {
            ElementIterator it = new ElementIterator(doc);
            Element elem = it.first();
            do {
                System.out.println(elem.getName() + " " + elem.getStartOffset());
                elem = it.next();
            }
            while (elem != null);
            Enumeration rules = css.getStyleNames();
            while (rules.hasMoreElements()) {
                String name = (String) rules.nextElement();
                Style rule = css.getStyle(name);
                System.out.println(rule.toString());
            }
        }
    }

    protected void basicActions(int actionType) {
        int pos = ep.getSelectionStart();
        Element elem = doc.getCharacterElement(pos);
        String text = ep.getSelectedText();
        SimpleAttributeSet newAttr = new SimpleAttributeSet();
        AttributeSet a = elem.getAttributes();
        newAttr.addAttributes(a);
        if (text != null) {
            switch (actionType) {
                case BOLD_ACTION :
                    if (a.getAttribute(HTML.Tag.B) == null) {
                        newAttr.addAttribute(HTML.Tag.B, "");
                    } else {
                        newAttr.removeAttribute(HTML.Tag.B);
                    }
                    break;
                case ITALIC_ACTION :
                    if (a.getAttribute(HTML.Tag.I) == null) {
                        newAttr.addAttribute(HTML.Tag.I, "");
                    } else {
                        newAttr.removeAttribute(HTML.Tag.I);
                    }
                    break;
                case UNDERLINE_ACTION :
                    if (a.getAttribute(HTML.Tag.U) == null) {
                        newAttr.addAttribute(HTML.Tag.U, "");
                    } else {
                        newAttr.removeAttribute(HTML.Tag.U);
                    }
                    break;
                case LINK_ACTION :
                    SimpleAttributeSet hrefAttr = new SimpleAttributeSet();
                    String href = (String) JOptionPane.showInputDialog(this,
                        "Enter URL here", "Link", JOptionPane.QUESTION_MESSAGE);
                    if (href == null) {
                        return;
                    }
                    hrefAttr.addAttribute(HTML.Attribute.HREF, href);
                    if (a.getAttribute(HTML.Tag.A) == null) {
                        newAttr.addAttribute(HTML.Tag.A, hrefAttr);
                    } else {
                        newAttr.removeAttribute(HTML.Tag.A);
                    }
            }
            try {
                doc.remove(pos, text.length());
            }
            catch (BadLocationException exception) {
                System.out.println("Remove " + exception + " : " + pos);
            }
            try {
                doc.insertString(pos, text, newAttr);
            }
            catch (BadLocationException exception) {
                System.out.println("Insertion " + exception + " : " + pos);
            }
        }
    }

    public static void main(String[] args) {
        SimplyHTML f = new SimplyHTML();
        f.setSize(400, 300);
        f.addWindowListener(new WindowAdapter() {
            public void windowClosing(WindowEvent e) {
                System.exit(0);
            }
        });
        f.setVisible(true);
    }

    class BreakAction extends AbstractAction {
        BreakAction(String name) {
            super(name);
        }

        public void actionPerformed(ActionEvent e) {
          int pos = ep.getSelectionStart();
            try {
                kit.insertHTML(doc, pos, "<BR>", 0, 0, HTML.Tag.BR);
                ep.setCaretPosition(pos+1);
            }
            catch (Exception exception) {
                System.out.println("Insert break fail : " + exception + " : " + pos);
            }
        ep.repaint();
        }


    }

    class BoldAction extends AbstractAction {
        BoldAction(String name) {
            super(name);
        }

        public void actionPerformed(ActionEvent e) {
            basicActions(SimplyHTML.this.BOLD_ACTION);
        }
    }

    class ItalicAction extends AbstractAction {
        ItalicAction(String name) {
            super(name);
        }

        public void actionPerformed(ActionEvent e) {
            basicActions(SimplyHTML.this.ITALIC_ACTION);
        }
    }

    class UnderlineAction extends AbstractAction {
        UnderlineAction(String name) {
            super(name);
        }

        public void actionPerformed(ActionEvent e) {
            basicActions(SimplyHTML.this.UNDERLINE_ACTION);
        }
    }

    class LinkAction extends AbstractAction {
        LinkAction(String name) {
            super(name);
        }

        public void actionPerformed(ActionEvent e) {
            basicActions(SimplyHTML.this.LINK_ACTION);
        }
    }
}

In this code, I insert HTML string which contains <BR> and
a set of buttons which contains break insertion. In both
situation inserting a word, right after break would move it
to the previous line after a space is pressed. This also
occurs for other following word.
(Review ID: 56747)
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