/**
 * From http://java-sl.com/tip_html_letter_wrap.html
 */
package com.opendoorlogistics.codefromweb;

import java.awt.Dimension;

import javax.swing.JEditorPane;
import javax.swing.JFrame;
import javax.swing.JSplitPane;
import javax.swing.SizeRequirements;
import javax.swing.text.Element;
import javax.swing.text.View;
import javax.swing.text.ViewFactory;
import javax.swing.text.html.HTMLEditorKit;
import javax.swing.text.html.InlineView;
import javax.swing.text.html.ParagraphView;

public class HtmlLetterWrap extends HTMLEditorKit{
    @Override 
    public ViewFactory getViewFactory(){ 

        return new HTMLFactory(){ 
            public View create(Element e){ 
               View v = super.create(e); 
               if(v instanceof InlineView){ 
                   return new InlineView(e){ 
                       public int getBreakWeight(int axis, float pos, float len) { 
                           return GoodBreakWeight; 
                       } 
                       public View breakView(int axis, int p0, float pos, float len) { 
                           if(axis == View.X_AXIS) { 
                               checkPainter(); 
                               int p1 = getGlyphPainter().getBoundedPosition(this, p0, pos, len); 
                               if(p0 == getStartOffset() && p1 == getEndOffset()) { 
                                   return this; 
                               } 
                               return createFragment(p0, p1); 
                           } 
                           return this; 
                         } 
                     }; 
               } 
               else if (v instanceof ParagraphView) { 
                   return new ParagraphView(e) { 
                       protected SizeRequirements calculateMinorAxisRequirements(int axis, SizeRequirements r) { 
                           if (r == null) { 
                                 r = new SizeRequirements(); 
                           } 
                           float pref = layoutPool.getPreferredSpan(axis); 
                           float min = layoutPool.getMinimumSpan(axis); 
                           // Don't include insets, Box.getXXXSpan will include them. 
                             r.minimum = (int)min; 
                             r.preferred = Math.max(r.minimum, (int) pref); 
                             r.maximum = Integer.MAX_VALUE; 
                             r.alignment = 0.5f; 
                           return r; 
                         } 

                     }; 
                 } 
               return v; 
             } 
         }; 
     } 
    
    public static void main(String[] args) { 
        final JFrame frame = new JFrame("Letter wrap test"); 
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
 
        final JEditorPane htmlTextPane = new JEditorPane();
        htmlTextPane.setEditorKit(new HtmlLetterWrap());
        htmlTextPane.setContentType("text/html"); 
        htmlTextPane.setText("This text pane contains html. The custom HTMLEditorKit supports single letter wrapping."); 
 
        JEditorPane noHtmlTextPane = new JEditorPane(); 
        noHtmlTextPane.setText("This text pane contains no html. It supports single letter wrapping!"); 
 
        htmlTextPane.setMinimumSize(new Dimension(0, 0)); 
        noHtmlTextPane.setMinimumSize(new Dimension(0, 0)); 
 
        JSplitPane splitPane = new JSplitPane(JSplitPane.HORIZONTAL_SPLIT, noHtmlTextPane, htmlTextPane); 
        splitPane.setContinuousLayout(true); 
 
        frame.add(splitPane); 
 
        frame.setSize(200, 200); 
        frame.setVisible(true); 
        splitPane.setDividerLocation(.5); 
        
    } 
}