htmleditor.java

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package connex.app.utils.HTMLUtils;

import java.awt.*;

import javax.swing.*;
import javax.swing.text.html.HTMLEditorKit;
import javax.swing.text.StyleConstants;
import javax.swing.text.StyledEditorKit.AlignmentAction;
import javax.swing.text.html.HTMLDocument;
import java.awt.event.ActionEvent;
import java.util.ArrayList;
import java.awt.event.ActionListener;
import javax.swing.text.StyledEditorKit;
import org.jdesktop.jdnc.incubator.jxcombobox.colorcombo.ColorComboBox;
import javax.swing.event.ChangeListener;
import javax.swing.event.ChangeEvent;
import javax.swing.text.Element;
import javax.swing.text.AttributeSet;
import javax.swing.text.html.CSS;
import java.io.File;
import org.jdesktop.swingx.JXEditorPane;
import connex.app.utils.ToolBar;
import java.awt.event.FocusAdapter;
import java.awt.event.FocusEvent;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import java.beans.PropertyChangeListener;
import java.beans.PropertyChangeEvent;
import javax.swing.event.CaretListener;
import javax.swing.event.CaretEvent;
import javax.swing.event.PopupMenuListener;
import java.awt.event.ItemListener;
import java.awt.event.ItemEvent;

/**
 * <p>Title: </p>
 *
 * <p>Description: </p>
 *
 * <p>Copyright: Copyright (c) 2006</p>
 *
 * <p>Company: FH-Dortmund</p>
 *
 * @author not attributable
 * @version 1.0
 */
public class HTMLEditor extends JPanel {
    private HTMLEditorKit kit;
    private HTMLDocument htmlDocument;
    FlowLayout flowLayout1 = new FlowLayout();
    private BorderLayout borderLayout1 = new BorderLayout();
    private ToolBar toolbar = new ToolBar();
    private JScrollPane jScrollPane1 = new JScrollPane();
    private JXEditorPane editor = new JXEditorPane();
    private JPanel jPanel1 = new JPanel();

    private JComboBox font = new JComboBox();
    //private JButton size = new JButton();

    private JComboBox size = new JComboBox();
    private JPopupMenu sizeMenu = new JPopupMenu();


    private boolean bld;
    private boolean under;
    private boolean itlc;
    private JToggleButton left = new JToggleButton(new AlignmentAction(
            "", StyleConstants.ALIGN_LEFT));
    private JToggleButton center = new JToggleButton(new AlignmentAction(
            "", StyleConstants.ALIGN_CENTER));
    private JToggleButton right = new JToggleButton(new AlignmentAction(
            "", StyleConstants.ALIGN_RIGHT));

    private JToggleButton bold = new JToggleButton(new HTMLEditorKit.BoldAction());
    private JToggleButton italic = new JToggleButton(new HTMLEditorKit.
            ItalicAction());
    private JToggleButton underline = new JToggleButton(new HTMLEditorKit.
            UnderlineAction());

    private JComboBox color = new JComboBox();

    /*****  images */
    ImageIcon leftIco = new ImageIcon("resources"+File.separator+"images" + File.separator + "editkit" +
                                      File.separator + "left.gif");
    ImageIcon centerIco = new ImageIcon("resources"+File.separator+"images" + File.separator + "editkit" +
                                        File.separator + "center.gif");
    ImageIcon rightIco = new ImageIcon("resources"+File.separator+"images" + File.separator + "editkit" +
                                       File.separator + "right.gif");

    ImageIcon boldIco = new ImageIcon("resources"+File.separator+"images" + File.separator + "editkit" +
                                      File.separator + "bold.gif");
    ImageIcon italIcico = new ImageIcon("resources"+File.separator+"images" + File.separator + "editkit" +
                                        File.separator + "italic.gif");
    ImageIcon underlineIco = new ImageIcon("resources"+File.separator+"images" + File.separator + "editkit" +
                                           File.separator +
                                           "underline.gif");
    private FlowLayout flowLayout2 = new FlowLayout();
    public HTMLEditor() {
        try {
            jbInit();
        } catch (Exception exception) {
            exception.printStackTrace();
        }
    }

    private void jbInit() throws Exception {

        toolbar.setPreferredSize(new Dimension(119, 39));
        kit = new HTMLEditorKit();
        htmlDocument = (HTMLDocument) (kit.createDefaultDocument());

        editor.setEditorKit(kit);

        editor.setCursor(new Cursor(Cursor.TEXT_CURSOR));
        editor.addKeyListener(new KeyAdapter() {
            public void keyTyped(KeyEvent e) {
                editor_keyTyped(e);
            }
        });

        editor.setDocument(htmlDocument);
        editor.setCaretPosition(0);

        editor.getCaret().addChangeListener(new ChangeListener() {
            public void stateChanged(ChangeEvent e) {

                Element elm = htmlDocument.getCharacterElement(editor
                        .getCaretPosition());
                Element par = htmlDocument.getParagraphElement(
                        editor.getCaretPosition());
                AttributeSet parAttr = par.getAttributes();
                AttributeSet elmAttr = elm.getAttributes();

                bold.setSelected(
                        htmlDocument.getFont(elm.getAttributes()).isBold());
                italic.setSelected(
                        htmlDocument.getFont(elm.getAttributes()).isItalic());
                underline.setSelected(
                        elmAttr.isDefined(CSS.Attribute.TEXT_DECORATION)
                        &&
                        elmAttr.getAttribute(CSS.Attribute.TEXT_DECORATION).
                        toString().
                        equals("underline"));
                right.setSelected(
                        parAttr.isDefined(CSS.Attribute.TEXT_ALIGN)
                        &&
                        parAttr.getAttribute(CSS.Attribute.TEXT_ALIGN).toString().
                        equals(
                                "right"));
                center.setSelected(
                        parAttr.isDefined(CSS.Attribute.TEXT_ALIGN)
                        &&
                        parAttr.getAttribute(CSS.Attribute.TEXT_ALIGN).toString().
                        equals(
                                "center"));
                left.setSelected(
                        parAttr.isDefined(CSS.Attribute.TEXT_ALIGN)
                        &&
                        parAttr.getAttribute(CSS.Attribute.TEXT_ALIGN).toString().
                        equals(
                                "left"));

                //  fontCombo.setSelectedItem(htmlDocument.getFont(elm.getAttributes()));

                // color.setSelectedItem((Color)htmlDocument.getForeground(elm.getAttributes()));

            }
        });

        this.setLayout(borderLayout1);
        this.setBackground(Color.white);

        size.setFont(new java.awt.Font("Arial", Font.BOLD, 14));
        size.setOpaque(false);

        size.setRequestFocusEnabled(false);
        size.addItemListener(new ItemListener() {
            public void itemStateChanged(ItemEvent e) {
                size_itemStateChanged(e);
            }
        });
        this.addSizes();
        size.setSelectedIndex(5);
        jScrollPane1.setBorder(null);
        bold.setMargin(new Insets(0, 0, 0, 0));
        bold.setText("");
        italic.setMargin(new Insets(0, 0, 0, 0));
        italic.setText("");
        underline.setMargin(new Insets(0, 0, 0, 0));
        underline.setText("");
        left.setMargin(new Insets(0, 0, 0, 0));
        center.setMargin(new Insets(0, 0, 0, 0));
        right.setMargin(new Insets(0, 0, 0, 0));
        toolbar.setLayout(flowLayout2);

        font = getFontComboBox();
        font.setSelectedIndex(2);
        setSelectedFont();
        color = new ColorComboBox();
        color.setBorder(BorderFactory.createEmptyBorder());
        color.setOpaque(false);
        color.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                btnColor_actionPerformed(e);
            }
        });

        left.setRequestFocusEnabled(false);
        left.setOpaque(false);
        left.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                center.setSelected(false);
                right.setSelected(false);

            }
        });

        center.setRequestFocusEnabled(false);
        center.setOpaque(false);
        center.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                left.setSelected(false);
                right.setSelected(false);

            }
        });

        right.setRequestFocusEnabled(false);
        right.setOpaque(false);
        right.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                center.setSelected(false);
                left.setSelected(false);
            }
        });

        bold.setRequestFocusEnabled(false);
        bold.setOpaque(false);

        italic.setRequestFocusEnabled(false);
        italic.setOpaque(false);

        underline.setRequestFocusEnabled(false);
        underline.setOpaque(false);

        font.setPreferredSize(new Dimension(64, 25));

        font.setRequestFocusEnabled(false);
        color.setPreferredSize(new Dimension(44, 30));
        color.setRequestFocusEnabled(false);

        left.setIcon(leftIco);
        center.setIcon(centerIco);
        right.setIcon(rightIco);
        bold.setIcon(boldIco);
        italic.setIcon(italIcico);
        underline.setIcon(underlineIco);

        jPanel1.setOpaque(false);
        //toolbar.setLayout(flowLayout1);
        toolbar.setFloatable(false);
        toolbar.add(font);
        toolbar.add(size);
        toolbar.add(left);
        toolbar.add(center);

        toolbar.add(right);
        toolbar.add(bold);
        toolbar.add(italic);
        toolbar.add(underline);
        toolbar.add(color);
        this.add(jScrollPane1, java.awt.BorderLayout.CENTER);
        this.add(toolbar, java.awt.BorderLayout.NORTH);
        this.add(jPanel1, java.awt.BorderLayout.SOUTH);
        jScrollPane1.getViewport().add(editor);

    }

    protected void addComponent(JComponent btn) {
        btn.setPreferredSize(new Dimension(46, 30));
        toolbar.add(btn);
    }

    private void addSizes() {
        size.addItem(new Integer(8));
        size.addItem(new Integer(9));
        size.addItem(new Integer(10));
        size.addItem(new Integer(11));
        size.addItem(new Integer(12));
        size.addItem(new Integer(14));
        size.addItem(new Integer(16));
        size.addItem(new Integer(18));
        size.addItem(new Integer(20));
        size.addItem(new Integer(22));
        size.addItem(new Integer(24));
        size.addItem(new Integer(26));
        size.addItem(new Integer(28));
        size.addItem(new Integer(36));
        size.addItem(new Integer(48));
        size.addItem(new Integer(72));

    }

    public void clear() {

        editor.setText("");
        setSelectedFont();

    }

    /**
     * Returns the HTML text contained in this HTMLEditor's body.
     * @return HTML text
     */
    public String getBodyText() {
        String txt = editor.getText();
        int pos1 = txt.indexOf("<body>") + 6;
        int pos2 = txt.lastIndexOf("</body>");
        txt = txt.substring(pos1, pos2);
        return txt;
    }

    /**
     * Appends the specified HTML text.
     * @param html the HTML text to append
     */
    public void addHTML(String html) {
        String txt = editor.getText();
        int pos;
        pos = txt.lastIndexOf("</p>");
        if (pos == -1) {
            pos = txt.lastIndexOf("</p>");
        }
        if (pos >= 0) {
            editor.setText(txt.substring(0, pos) + html + txt.substring(pos));
        }

        editor.setCaretPosition(htmlDocument.getLength());

    }

    public JEditorPane getEditor() {
        return this.editor;
    }

    public JComboBox getFontComboBox() {

        Font[] fonts = GraphicsEnvironment.getLocalGraphicsEnvironment().
                       getAllFonts();

        ArrayList fontList = new ArrayList(10);
        for (int i = 0; i < fonts.length; i++) {
            if (!fontList.contains(fonts[i].getFamily())) {
                //System.out.println(fonts[i].getFamily());
                fontList.add(fonts[i].deriveFont(12.0f));
            }
        }
        fonts = new Font[fontList.size()];
        fontList.toArray(fonts);

        final JComboBox comboBox = new JComboBox(fonts);
        comboBox.setFont(fonts[2]);
        comboBox.setRenderer(new DefaultListCellRenderer() {
            public Component getListCellRendererComponent(JList list,
                    Object value,
                    int index, boolean isSelected, boolean cellHasFocus) {
                Font font = (Font) value;
                JLabel label = (JLabel)super.getListCellRendererComponent(list,
                        font.getFamily(), index, isSelected, cellHasFocus);
                label.setFont(font);
                return label;
            }
        });
        comboBox.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {

                setSelectedFont();
            }
        });

        return comboBox;

    }

    public void btnColor_actionPerformed(ActionEvent e) {
        Color c =
                (Color) color.getSelectedItem();

        if (c != null) {

            new StyledEditorKit.ForegroundAction("", c).actionPerformed(
                    new ActionEvent(editor,
                                    ActionEvent.ACTION_PERFORMED, ""));

        }
    }

    public void setSelectedFont() {
        StyledEditorKit.FontFamilyAction action = new StyledEditorKit.
                                                  FontFamilyAction
                                                  ("",
                ((Font) font.getSelectedItem()).getFamily());
        font.setFont((Font) font.getSelectedItem());
        action.actionPerformed(new ActionEvent(font, ActionEvent.ACTION_PERFORMED,
                                               ""));

    }

    public static void main(String arg[]) {
        JFrame f = new JFrame();
        f.setSize(400, 400);
        f.add(new HTMLEditor());
        f.setVisible(true);
    }


    public void editor_keyTyped(KeyEvent e) {
        this.setSelectedFont();
        btnColor_actionPerformed(null);
        new HTMLEditorKit.FontSizeAction("", (Integer) size.getSelectedItem()).
                actionPerformed(null);

    }

    public void size_itemStateChanged(ItemEvent e) {
        new HTMLEditorKit.FontSizeAction("", (Integer) size.getSelectedItem()).
                actionPerformed(null);
    }


}