/*

 * Copyright 1998-2000 Sun Microsystems, Inc.  All Rights Reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Sun designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Sun in the LICENSE file that accompanied this code.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

 * CA 95054 USA or visit www.sun.com if you need additional information or

 * have any questions.

 */

package javax.swing.text.html;

import java.awt.*;

import java.awt.event.*;

import java.net.URLEncoder;

import java.net.MalformedURLException;

import java.io.IOException;

import java.net.URL;

import javax.swing.text.*;

import javax.swing.*;

/**

 * A view that supports the <ISINDEX< tag.  This is implemented

 * as a JPanel that contains

 *

 * @author Sunita Mani

 */

class IsindexView extends ComponentView implements ActionListener {

    JTextField textField;

    /**

     * Creates an IsindexView

     */

    public IsindexView(Element elem) {

        super(elem);

    }

    /**

     * Creates the components necessary to to implement

     * this view.  The component returned is a <code>JPanel</code>,

     * that contains the PROMPT to the left and <code>JTextField</code>

     * to the right.

     */

    public Component createComponent() {

        AttributeSet attr = getElement().getAttributes();

        JPanel panel = new JPanel(new BorderLayout());

        panel.setBackground(null);

        String prompt = (String)attr.getAttribute(HTML.Attribute.PROMPT);

        if (prompt == null) {

            prompt = UIManager.getString("IsindexView.prompt");

        }

        JLabel label = new JLabel(prompt);

        textField = new JTextField();

        textField.addActionListener(this);

        panel.add(label, BorderLayout.WEST);

        panel.add(textField, BorderLayout.CENTER);

        panel.setAlignmentY(1.0f);

        panel.setOpaque(false);

        return panel;

    }

    /**

     * Responsible for processing the ActionEvent.

     * In this case this is hitting enter/return

     * in the text field.  This will construct the

     * URL from the base URL of the document.

     * To the URL is appended a '?' followed by the

     * contents of the JTextField.  The search

     * contents are URLEncoded.

     */

    public void actionPerformed(ActionEvent evt) {

        String data = textField.getText();

        if (data != null) {

            data = URLEncoder.encode(data);

        }

        AttributeSet attr = getElement().getAttributes();

        HTMLDocument hdoc = (HTMLDocument)getElement().getDocument();

        String action = (String) attr.getAttribute(HTML.Attribute.ACTION);

        if (action == null) {

            action = hdoc.getBase().toString();

        }

        try {

            URL url = new URL(action+"?"+data);

            JEditorPane pane = (JEditorPane)getContainer();

            pane.setPage(url);

        } catch (MalformedURLException e1) {

        } catch (IOException e2) {

        }

    }

}